Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92457234f9ae5f1…

MALICIOUS

PDF

39.0 KB Authoring application: Scribus
MD5: e96d6f65b410b02f87258819e615933c SHA-1: 5522d126f3ebdf33558785d93f96f424c8ee1165 SHA-256: e92457234f9ae5f17f1a16be7e84f1e0a2bfee7c4eb41c23b29d835766e0f4c2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is consistent with a link farm or SEO poisoning attack, designed to drive traffic or distribute further malicious content. No scripts were extracted, and the document body was heavily obfuscated and unreadable.

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://alixxpartners.com/uploads/1/3/0/5/130539797/e68b60295.pdf
    • http://kobrathelabel.com/uploads/1/3/0/6/130639294/nuwamibakujimu.pdf
    • http://carrieannphotography.net/uploads/1/3/0/6/130639326/9003720.pdf
    • http://directmarketinganalytics.com/uploads/1/3/0/5/130588806/8220bc.pdf
    • http://mrspaynes.com.au/uploads/1/3/0/7/130739396/7633475.pdf
    • http://whythedogdied.com/uploads/1/3/0/5/130543188/7385225.pdf
    • http://regencymorgans.net/uploads/1/3/0/4/130483886/3905414.pdf
    • http://mtsgreenwood.com/uploads/1/3/0/6/130604049/6540447.pdf
    • http://shambling-shimmies.com/uploads/1/3/0/6/130620975/22039.pdf
    • http://12ktrv.com/uploads/1/3/0/6/130621446/5883102.pdf
    • http://mail.inovamedtech.com/uploads/1/3/0/8/130813314/ece5dec95eefa.pdf
    • http://peterdoseck.net/uploads/1/3/0/4/130475966/5829028.pdf
    • http://www.apismellifera2.com/uploads/1/3/0/5/130588318/bee48166.pdf
    • http://abbotttestprep.com/uploads/1/3/0/3/130323984/264cf3a2fa.pdf
    • http://pravinya.org/uploads/1/3/0/8/130874634/fejunodutefixif.pdf
    • http://eventsnewmexico.com/uploads/1/3/0/6/130604049/6991837.pdf
    • http://professionalrenovationsofhamptonroads.com/uploads/1/3/0/5/130588754/dizoji-soxuvaxomodomew.pdf
    • http://595corporateparkofcommerce.com/uploads/1/3/0/6/130640003/zubom_lemonitutitak.pdf
    • http://alliumbatam-v1.devsite-1.com/uploads/1/3/0/6/130621614/130621614.html#ukulele+tabs+chords+chart
    • http://mtsgreenwood.com/uploads/1/3/0/6/1306040

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c15.bin
1b3f82cd74c5b6671cc0c0d4a6c7877b74bb57ca469b2a61ef541918e41af838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C15 2652 bytes
font_01_sfnt_off00003846.bin
469716fdf0c169f5c8a21188461af32d03126f837f62258c59ca6ce07fdb441d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3846 8760 bytes

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