Malicious PDF — malware analysis report

Static analysis result for SHA-256 77cbc5551f3b32f3…

MALICIOUS

PDF

45.2 KB Authoring application: SWFTools
MD5: 9747b9a4dbca5c0acc7e4a356379ecb5 SHA-1: 0255b72d38ef326dfba57c37a748ab0a4cd17eee SHA-256: 77cbc5551f3b32f3e1e1b83e64fa2c30125918f76f7986f96ebfb419c1f0d1ac
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as phishing-related malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://qandiawards.com/uploads/1/3/0/5/130551461/xevoronotaw_vovuramaseworog.pdf
    • http://remtriclub.com/uploads/1/3/0/5/130588517/valuw.pdf
    • http://sedopifet.m-zdorov.ru/uploads/2020/01/28/ebe42254761e8ba.pdf
    • http://meritcardmoapp.com/uploads/1/3/0/4/130483303/6308990.pdf
    • http://jdlockhartphotography.com/uploads/1/3/0/2/130272233/8106661.pdf
    • http://boneyardbeanies.com/uploads/1/3/0/5/130588159/kiromixarexaka.pdf
    • http://kylaconner.com/uploads/1/3/0/2/130271043/130271043.html#math+worksheets+for+kindergarten+printable+free
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012fb.bin
3162020669a751ce75770513632bf7220037d1ec3e1f2e7632ab9698674695a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB 8336 bytes
font_01_sfnt_off00006a47.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 16204 bytes

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