Malicious PDF — malware analysis report

Static analysis result for SHA-256 798d25596d480e75…

MALICIOUS

PDF

36.2 KB Authoring application: SWFTools
MD5: 168a573de0abbedcd8e071c0b93b7a17 SHA-1: 0cc0d2470c13bdcc4e124be8a52fb13d63debf0d SHA-256: 798d25596d480e75c7dae8d708b04dd2593a5412730c8d08153c55acdb8510c5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF files, a technique commonly used for SEO poisoning or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary indicators of compromise, likely serving as landing pages for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://wizenglish.school/uploads/1/3/0/6/130639445/c3fe69b3019c924.pdf
    • http://ricreativemag.com/uploads/1/3/0/8/130813317/4562552.pdf
    • http://mail.arbredevie.ca/uploads/1/3/0/6/130639393/6596221.pdf
    • http://ukm-hq.com/uploads/1/3/0/4/130435891/nobusaxisudawud.pdf
    • http://crosshopefellowship.org/uploads/1/3/0/3/130313746/9796930.pdf
    • http://merakiah.com/uploads/1/3/0/5/130550925/fusapine.pdf
    • http://planetarywellbeing.org/uploads/1/3/0/2/130288542/jupimafobezimijota.pdf
    • http://www.maipreferredproperties.com/uploads/1/3/0/4/130488584/vosunole.pdf
    • http://tablet-healthcare.com/uploads/1/3/0/7/130776687/bekelovedokodik-xabemogowub-fuvedararule-pudabeda.pdf
    • http://anongroup.org/uploads/1/3/0/2/130271076/webepuxu-zakiwi.pdf
    • http://simplyfitfoods.com/uploads/1/3/0/5/130550857/2592595.pdf
    • http://christilsed.com/uploads/1/3/0/2/130287548/1454441.pdf
    • http://sarfa.org/uploads/1/3/0/5/130540525/regobuduxitede.pdf
    • http://bohemianbirth.ca/uploads/1/3/0/6/130639164/a6b559420c2e.pdf
    • http://74-123-77-190.mgwnet.com/uploads/1/3/0/6/130639365/130639365.html#dog+breast+cancer+lump+treatment

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033e5.bin
862a9ca0e0ce6e7056928d857278f6294911e58d0e12109dbdc429920126671f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33E5 7828 bytes

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