Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2e983a553c8ef4…

MALICIOUS

PDF

85.2 KB Created: 2021-09-19 05:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c145f146bb0dc18acc8aef9ad39a6d9f SHA-1: d0cbdd204a468965767938d5c552ef749eb2339a SHA-256: 9c2e983a553c8ef4a2b290a65ca0cc18479cd10e0c373ec9b8ce3b722e03896f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded JavaScript indicates an attempt to execute code, likely to facilitate the phishing or payload download described by the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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) 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.
  • 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://oniceh.ru/uplcv?utm_term=italian+made+simple+revised+and+updated+pdf PDF link annotation
    • https://doanhnghiepvietnam.org/img_duhoc/files/80599505436.pdfIn PDF document text
    • http://evola.it/userfiles/files/95532255634.pdfIn PDF document text
    • http://net-marketing.hu/images/files/siwaderejotawedetoniran.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/lutudamitilirolinitu.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139da71489f4---betewiragukik.pdfIn PDF document text
    • http://primaneighbors.com/userimages/fodonugagafeluseno.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/96155666397.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/lidaraz.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/23388553375.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210919071047.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/24770923258.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40551873760.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/4831781956.pdfIn PDF document text
    • https://people11people.gr/uploads/File/88896144498.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/xiwapofot.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/paxavapakinov.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/muxijorovaderitidizivo.pdfIn PDF document text
    • https://architektor.ru/uploads/file/15963059563.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/da995dd26aba2d7c563d5cb936dfd17a/pojejabaweb.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/25972817034.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613fff495ee57---5345514637.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/45353922670.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/a401d4bb0a4f796e7dabe86e3b22ca4e/fojuritirujom.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/2ec7efde45a52b2c3c26fd75e5f3dc77/wojezuxutofu.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_off0000e7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E7 10656 bytes
SHA-256: f58e70a863c8e606df6c9bb27a7f579ea2110aef7373103a825bc1b285eda735
font_01_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 17784 bytes
SHA-256: 8581f8e346f6a24fe23636c6ea3cfbef45a95dd61e61a862c34ff82b785188ff
font_02_sfnt_off00012e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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