Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ef8bb72806b985…

MALICIOUS

PDF

33.9 KB Authoring application: pstoedit
MD5: f2f8837abc1e19240fb8ea76aafc0ac8 SHA-1: 2f4987a925011226ac070825d3c4861edfe00811 SHA-256: 50ef8bb72806b98559489c839ae8830de111ab56ff084464b2fe3240c516fce0
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files, disguised as a study skills guide. This behavior is indicative of a link farm or redirection tactic, likely intended to lead users to malicious content. The ClamAV detection and ML classifier strongly support its malicious nature, classifying it as phishing-related malware.

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://mountaintownplanners.org/uploads/1/3/0/6/130604014/0233393b.pdf
    • http://overthetoprentals.com/uploads/1/3/0/6/130604034/dedewowewizozo.pdf
    • http://texasstocklawyer.com/uploads/1/3/0/7/130776411/6565f5471b.pdf
    • http://newmexicolegalhelp.com/uploads/1/3/0/6/130604944/xukegaxabejaw-resagulofatak-jojusomivig-xemutobenuboxed.pdf
    • http://missgojo.com/uploads/1/3/0/6/130621225/pakagupibubasuparen.pdf
    • http://mobilecraftbottlingcompany.com/uploads/1/3/0/4/130483872/7898402.pdf
    • http://assentive.net/uploads/1/3/0/3/130323424/wevaxabotaputo_mokime_xidijapev.pdf
    • http://barrygjohnsonsr.com/uploads/1/3/0/4/130435875/vapurutipudaluwuzura.pdf
    • http://northbeavercontracting.net/uploads/1/3/0/6/130604708/pimopamepibuje-bozafiv-siruferazowozu-lukidezadus.pdf
    • http://blackfriday.dng.ie/uploads/1/3/0/6/130621426/9883057.pdf
    • http://colddiamnd.com/uploads/1/3/0/3/130379118/130379118.html#the+middle+school+student%27s+guide+to+study+skills+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000131f.bin
c75ebe18cc88e1b9f435bdcfa48daa8f532c17daf309a9adadeeca8ee888df91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131F 7792 bytes

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