Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bff31c69c6ce165…

MALICIOUS

PDF

33.8 KB Authoring application: Poppler-utils
MD5: a992cd53ebc393972b43cc63ae782880 SHA-1: 1daf76c77129681bcc95f9576df8b4555fc661c6 SHA-256: 5bff31c69c6ce1654490bbd985d2287907d6b73466289e20320407a557f27f23
152 Risk Score

Malware Insights

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

The PDF contains a link farm of external PDF files, disguised as song downloads, which is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://carynmartinwellness.weebly.com/uploads/1/3/0/6/130604589/bojuxa_ximakukuvaditi_kemige.pdf
    • http://mommalovesyou.net/uploads/1/3/0/4/130476427/2177215.pdf
    • http://victordata.net/uploads/1/3/0/6/130622104/6f54d271294e6b4.pdf
    • http://mountforesthomecoming.ca/uploads/1/3/0/5/130588424/130588424.html#download+song+aye+mere+humsafar+ek+z
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000101e.bin
f9a0b1793bb452efa344dffaef8cc17d0e7866871b3c3fe7ba3d4ee76a8793d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E 8156 bytes
font_01_sfnt_off0000488e.bin
50224c6c483bfa86a10f62efd7baa2c756f8036c0a911ebd537387e21b2fb6f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x488E 2732 bytes

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