Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b099f23a9f0edc…

MALICIOUS

PDF

39.0 KB Authoring application: pstoedit
MD5: d4c772e60c2081cace4f776b1cac9e57 SHA-1: db4dd802aaa0556c5257e44054f4d107b8ed9a27 SHA-256: d9b099f23a9f0edcd16e3e4ebcfc61aec10e915d5212e292df0bd23890344e4a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDFs, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, mentions 'Trigonometry solving trigonometric equations and inequalities pdf', suggesting a lure to disguise the malicious nature of the links.

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://mysaintbarx.com/uploads/1/3/0/4/130436007/4443151d5.pdf
    • http://miaouofficials.com/uploads/1/3/0/6/130620293/1eef0681d.pdf
    • http://suemoraes.com/uploads/1/3/0/6/130621732/voxifis.pdf
    • http://mycasasale.com/uploads/1/3/0/7/130775462/bea6d.pdf
    • http://www.bigbearsnowboardshop.com/uploads/1/3/0/5/130551125/5515352.pdf
    • http://barbarapulst.net/uploads/1/3/0/5/130590698/pisuja.pdf
    • http://manvotionals.net/uploads/1/3/0/7/130776504/5587944.pdf
    • http://cyberliabilitypro.com/uploads/1/3/0/5/130543366/d00d181db4d8.pdf
    • http://www.laurachaistypsychotherapy.co.uk/uploads/1/3/0/2/130287307/6abcc0e81b.pdf
    • http://grassroots.enterprises/uploads/1/3/0/8/130874124/mekekeligufakawa.pdf
    • http://beauhive.com/uploads/1/3/0/9/130969776/dc235b24.pdf
    • http://springella.com/uploads/1/3/0/6/130639055/wesarowoganu-poxuvumux-bevoziwev.pdf
    • http://missoulaimports.com/uploads/1/3/0/7/130739227/7798528.pdf
    • http://oxnardpoolcleaning.com/uploads/1/3/0/7/130775228/temewixobugokerudoti.pdf
    • http://mta-sts.mail.jenkinsphoto.com/uploads/1/3/0/3/130313115/bonemovovowode.pdf
    • http://molliebing.com/uploads/1/3/0/5/130590738/punusinigenedolil.pdf
    • http://cothrons.net/uploads/1/3/0/8/130814390/jibuzerasonibikidok.pdf
    • http://nikkileeyoga.com/uploads/1/3/0/2/130271094/07286bd3ee5b.pdf
    • http://yogapsychologycenter.com/uploads/1/3/0/7/130739454/pomebabiranugaj.pdf
    • http://www.darenn.com/uploads/1/3/0/7/130739490/130739490.html#trigonometry+solving+trigonometric+equations+and+inequalities+pdf
    • http://www.bigbearsnowboardshop.com/uploads/1/3/0/5/130551125/55

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a20.bin
c00b6edfe30620beac9d3286b0a4da713e548cf53d56fe878cbdc11d80642223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A20 7856 bytes

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