Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc7474af715687d…

MALICIOUS

PDF

114.9 KB Created: 2021-07-16 00:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 75e56e9b903040c4e252fab2f2227416 SHA-1: c46b60ca29b9d30eb1d180bf03e1c80b15e60301 SHA-256: abc7474af715687dbc0e8fb334a2526a13e0f12ce9f615dee134e3e81854f513
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests this document may be part of a social engineering scheme to trick users into downloading password-protected archives. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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 http://szpital-sulecin.pl/images/fckfiles/file/fujonenajujedeze.pdf In PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a2eb631ad2b---tuvosiwufes.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/lawota.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/hmr5h98sl0ftdpq9js0mt9s1j0/89234020710.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/taduzuxoxazifitufemu.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/978694305b6cc3e8faacf11916d292ef/84109835092.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16080aeea327dc---55261650110.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/f341b3cc1e1572988ceceddae11b4dd6/21089952266.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160723bd836748---wevofipa.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e36f4c7a0---80976690022.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbbbd96e9f---22361913730.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/31230014417.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/be33bbf3fb1f73f6d20a6e1fb14216fc/fuwefemasevewaj.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/14075948428.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/nilln6dui3jkioj201porp7n4n/delibuzitofujanabilag.pdfIn PDF document text
    • https://meccanicagambirasio.it/file/5167362576.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1621027857.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c3bdee50---35279474118.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/jejotojitozomugijali.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/fajudigitebol.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16077acfdc1ff9---vatomanidaredateves.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e37dbddf63c---bitige.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/84e7c6ea7f4ecea28f2c9afea16a55e3/83299946257.pdfIn PDF document text
    • https://inncredel.com/uploads/nalafilufip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=r+new+linePDF link annotation
    • 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_off00015e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E25 9584 bytes
SHA-256: 356ba8c0cec526afd86c525717570eeb5bd0c3187c1b1923d7eba22b81ee88dd
font_01_sfnt_off000172ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B01 19360 bytes
SHA-256: 8292ded7c063d0eb95de7e65db378da1d6f8aeb08d2bb254c7320c8f6510ab2e

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