Malicious PDF — malware analysis report

Static analysis result for SHA-256 af97cb52962df3ca…

MALICIOUS

PDF

85.9 KB Created: 2020-12-21 07:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdc813f595eae8857cff5fd43b407754 SHA-1: 179cdaa31778637620639932ae9598ed0e590863 SHA-256: af97cb52962df3ca870599b56a6ff38098ed5dbf6ccabbd1b0659f7ea06bec9a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be related to a search query, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=skyrim+blood+on+the+ice+stuck+on+follow+up
    • https://cdn-cms.f-static.net/uploads/4415756/normal_5f9dfb3fc9122.pdf
    • https://cdn-cms.f-static.net/uploads/4443325/normal_5fb981e7dcf79.pdf
    • https://cdn-cms.f-static.net/uploads/4465147/normal_5fd87686b251a.pdf
    • https://cdn-cms.f-static.net/uploads/4478123/normal_5fd672be1e74f.pdf
    • https://static.s123-cdn-static.com/uploads/4413978/normal_5fc90d2d7413e.pdf
    • https://cdn-cms.f-static.net/uploads/4449424/normal_5fa0742fd8dd8.pdf
    • https://cdn-cms.f-static.net/uploads/4446162/normal_5fd2d3083249a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/julexekubaj/animation_boy_images.pdf
    • https://s3.amazonaws.com/donukadizolin/english_grammar_questions.pdf
    • https://s3.amazonaws.com/saziwijaxodav/18181081019.pdf
    • https://s3.amazonaws.com/tutapaxi/galvin_green_waterproof_trousers_size_guide.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_off00011231.bin
f2de5c37ef8b2ba6f17bfd81057ed484f870a8eca224cf84963ad2b74e36f637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11231 5684 bytes
font_01_sfnt_off00012579.bin
3759f2f28d8c199a336f85a5a57c1cfbad9771956ef410fbc3949c3fcac52be6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12579 10872 bytes

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