Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb00c59dea84c5b5…

MALICIOUS

PDF

57.8 KB Authoring application: pdf-parser
MD5: db539287f74bcfb6276c5262a8b7c4c7 SHA-1: 276b25d4f21d2aad22721e0a1e1c1f18675cabe8 SHA-256: cb00c59dea84c5b5db28710c1ddfae8318efb7a8b32ccdd1c653b2ee8df9fbbf
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flagged this file as malicious. The embedded URLs suggest a phishing or malware distribution campaign, where users are directed to download further malicious content.

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://absystemsllcscam.com/uploads/1/3/0/5/130588195/bovuzet.pdf
    • http://countrywelcome.org/uploads/1/3/0/7/130775284/zelerojeduvupu.pdf
    • http://cybertronsolutions.com/uploads/1/3/0/8/130814189/c8ce1c34288.pdf
    • http://meyerpaintingcompany.com/uploads/1/3/0/4/130476148/e245893154d366e.pdf
    • http://nanoquests.com/uploads/1/3/0/7/130739475/af91b0.pdf
    • http://northwestfineartstudio.com/uploads/1/3/0/5/130546486/xewimidop-levutojexit-pajefikoluki-wuripusadiw.pdf
    • http://fullfitnesstennis.com/uploads/1/3/0/2/130289640/1188322.pdf
    • http://watersportsrep.com/uploads/1/3/0/3/130313200/fuzofuzevijotexev.pdf
    • http://westandbond.com/uploads/1/3/0/3/130323526/5393654.pdf
    • http://mymoneybuilder.org/uploads/1/3/0/6/130621141/4f112169bda463.pdf
    • http://hostmaster.stretchfilm.my/uploads/1/3/0/8/130814976/zunewuki-fonetinebun-watitid-nagejojil.pdf
    • http://www.investmentstrategiesforthelowwageearner.com/uploads/1/3/0/5/130588688/304f1.pdf
    • http://www.theacademyofchipley.com/uploads/1/3/0/2/130272101/pigigevokem-siresufupoma-luzadofuti-xulipejif.pdf
    • http://julianthology.com/uploads/1/3/0/5/130543210/130543210.html#continental+free+trade+area+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000149b.bin
ec4037f22b6458758d1e178b2cfd282b20355bbb3f2f23ea7b223c716fc38106		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149B 9776 bytes

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