Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e884d1487f5e49…

MALICIOUS

PDF

39.6 KB Authoring application: Mobipocket Creator First seen: 2020-09-24
MD5: e119c8946d781ccd71819ad734ee707a SHA-1: 4faa21e4865f20cba82f2d19ae855bb236580141 SHA-256: e2e884d1487f5e49a5ef93e04486a363e257db0bc260af9d9e1bb23b5e51f694
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic specifically identified a large number of external links, with the primary URL being http://davewalcott.com/uploads/1/3/0/5/130538923/813d3b.pdf. The document body, though heavily corrupted, also contains references to these external URLs, suggesting a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://davewalcott.com/uploads/1/3/0/5/130538923/813d3b.pdf In PDF document text
    • http://siyuanlipiano.com/uploads/1/3/0/4/130435702/fudubudugop_kuded_tinifibu.pdfIn PDF document text
    • http://prgisservices.com/uploads/1/3/0/3/130379824/35cf303f51.pdfIn PDF document text
    • http://realedchat.com/uploads/1/3/0/5/130550696/09897e.pdfIn PDF document text
    • http://5pointauto.com/uploads/1/3/0/4/130476572/130476572.html#bengali+film+villain+video+songs+freeIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000102d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D 8208 bytes
SHA-256: 081aebe5227233727a2b2e54c66deeb57ee660745a087e73f2c378f59241f31c
font_01_sfnt_off00004912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4912 16588 bytes
SHA-256: b9c84d35164c33d9e2fc2d3b3738daa184b73d6ba731d71bd613379ee6a43b94
font_02_sfnt_off00005f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F79 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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