Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb3453926b87ac7…

MALICIOUS

PDF

75.2 KB Created: 2021-07-12 21:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c323b0f065f2288bf7c1da897e89225 SHA-1: a6942ad93fe95d2e9ec8e92b6a88fdfe032fb32e SHA-256: 2fb3453926b87ac785796e939db46897b0bc8904973b98b50c60a7aa0835a9f2
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. The embedded URL, while flagged as benign by reputation services, points to content related to downloading a game, which is a common lure for phishing or malware distribution. The PDF structure itself contains embedded objects that are typical for malicious PDFs, and the authoring application suggests it may have been generated by a tool used for creating malicious documents.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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://feedproxy.google.com/~r/sq/ugae/~3/iYdez4bKglI/square?utm_term=download+free+gta+san+andreas+for+windows+10
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7f57880504e0a776a83b0/1625814392091/baxijozotunudesokopafop.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8cf75781e3e37a1857165/1625870197959/citizens_bank_and_trust_of_vivian.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c87f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC87F 16792 bytes
font_01_sfnt_off0000e096.bin
8185b58417818adea39532a613f6c40aa0d131822ca1bbb395e820c1deae9881		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE096 10792 bytes
font_02_sfnt_off0000f973.bin
4589f0832cee374767266d77a118a5fb687dd5b7f936957934e19446174c8daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF973 15436 bytes

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