Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef72474babae4c0…

MALICIOUS

PDF

100.8 KB Created: 2020-11-22 00:26:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff013637be5ab7812e5724b94f68d1f7 SHA-1: d0a3ef0eae38fc8edeb1fbffdc64c3b21990196d SHA-256: 3ef72474babae4c032fa2583fc7d11c7e4b9e13a10b7abd49d192b36c1162447
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a ClamAV signature and an ML classifier. It contains numerous external links, including one pointing to 'trafffi.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to an 'arrest warrant', which is a common lure for social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffi.ru/123?utm_term=arrest+warrant+oc
    • https://rolewexuvuviwu.weebly.com/uploads/1/3/4/7/134742390/gugebiponiviru_dajiledoxi_litovidedarow_rinewari.pdf
    • https://cdn-cms.f-static.net/uploads/4413967/normal_5fa40f7a4fd7a.pdf
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5fa2413452d0a.pdf
    • https://rutukosawokiw.weebly.com/uploads/1/3/4/3/134318214/gesewapaj_zujodud.pdf
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5fb4d8da0d0a9.pdf
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f8a96f767065.pdf
    • https://cdn-cms.f-static.net/uploads/4375528/normal_5f910d5279219.pdf
    • https://cdn-cms.f-static.net/uploads/4471513/normal_5fb6e6c6e7923.pdf
    • https://cdn-cms.f-static.net/uploads/4406191/normal_5fac610e7174a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gedimuta/adjectives_en_ingles.pdf
    • https://s3.amazonaws.com/remavuj/gizig.pdf
    • https://s3.amazonaws.com/befarekogol/vujosurusufolasum.pdf
    • https://s3.amazonaws.com/gurupixabogivaz/92284152614.pdf
    • https://s3.amazonaws.com/leguvefu/54957934010.pdf
    • https://s3.amazonaws.com/bezorito/tarzan_movie_greystoke.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015115.bin
c9a3bb23217c135363292518f7d0b6292a6b1c8d50840d7eafd087515180d9a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15115 4840 bytes
font_01_sfnt_off000161a9.bin
499d336fa746d8db1246effa121c35ef721ad5735c757bade0c9f9f2558b8f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161A9 10728 bytes

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