Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bd4ca431e3b1df…

MALICIOUS

PDF

87.0 KB Created: 2021-06-28 12:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 79fa9d4110d66ee218c61e594eb3c091 SHA-1: 38d2e7e09b98bd057b11c33a42d81cb841b0cdd3 SHA-256: 00bd4ca431e3b1df276b54b56cc45836d309291780a0324c2f2aae927b032af9
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains embedded JavaScript and a significant number of external links, many hosted on disposable or compromised domains, suggesting a phishing or credential harvesting attempt. The presence of heuristics indicating a 'Recovery secret / private key request' and a 'visual download button' strongly suggests the document is designed to trick users into revealing sensitive information or downloading further malicious content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=imyfone+lockwiper+android+registration+code+and+email+free PDF link annotation
    • https://gionggiacam.com/ckfinder/userfiles/files/puged.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/af3ac23e76b6bc3a0c6b860fb7f4e9cd/noxujiv.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/63020256108.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/4235294227.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/37422875104.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/kotedeperuwavominan.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/99157234299.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/wezaraxuxubefale.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/kmqjrast73374q02978c6malup/87531693835.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/bbb08d9ff94009d0fa0644cab7faed73/xopus.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/68131864777.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/6bc67cae49a599c898390719622ff434/dufapemevefam.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6be46ab5dc---gaderi.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210610212243587194nwuicf.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/0adu0g66ra71le4eknok4l3b4u/55449625411.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cf6133d52---12351699698.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/4119201d26efdb76aa8929b957566ef2/62454151007.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/ec4f756ec87def14e1c942d5a331b219/56361357779.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9065706ca1---neliresikazugefugor.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/guzegepoxuja.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d53ce06a4---42879218959.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9578f0f1e7---jurozo.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/6cmhnls2imo2vi5s0htorc9g2q/5628420615.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c05bc7e9d8---10018574541.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/2qopb1hi64db3u8m1n458u654k/15167160847.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10661 17632 bytes
SHA-256: 963a8b2d67fdcaf5b3707947dec427304cfc16d27aea6ef2d6e4d6d14e702524
font_02_sfnt_off00013410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13410 11204 bytes
SHA-256: e317b9113768294d9498f544bc3955ebc180420dc1a31867cffd019560e1a0f0