Malicious PDF — malware analysis report

Static analysis result for SHA-256 808735064c3fa23a…

MALICIOUS

PDF

81.5 KB Authoring application: Solid Converter PDF
MD5: bbeb80d8b43ff179ed80bd53827bab7b SHA-1: 254dc9b82853f3158084c43a25ba2106a9dccca6 SHA-256: 808735064c3fa23af3926f32c57ff79cf53dc542f05321c85ddf4e9a0f6d4eb7
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The primary attack pattern involves redirecting users through a link farm.

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://nickclayton.sexy/uploads/1/3/0/5/130551656/4419114.pdf
    • http://www.english-log-cabins.com/uploads/1/3/0/6/130621457/vutov.pdf
    • http://worldofcoffee-dublin.com/uploads/1/3/0/5/130590403/lufunewewurajogibure.pdf
    • http://www.seawbrasil.com/uploads/1/3/0/6/130639164/2f76face49cbbf.pdf
    • http://nomadicartist.org/uploads/1/3/0/6/130620964/bitubularode-tujemodaje-sepazuwudarod.pdf
    • http://blog.gunthorpfarms.com/uploads/1/3/0/5/130588716/5527431.pdf
    • http://katyspencer.com/uploads/1/3/0/6/130603721/kumelelekekafike.pdf
    • http://downsouthbait.com/uploads/1/3/0/5/130589249/04dd5a7.pdf
    • http://mexicofolk.net/uploads/1/3/0/5/130550982/3633120.pdf
    • http://riseuproadtrip.com/uploads/1/3/0/6/130620781/7120569.pdf
    • http://muttsearmitts.com/uploads/1/3/0/5/130538817/6301565.pdf
    • http://aljazeeraglobal.com/uploads/1/3/0/5/130539085/5969564.pdf
    • http://nachomamasbedandsnack.com/uploads/1/3/0/7/130739994/7af2a561.pdf
    • http://www.apromisetoyourself.com/uploads/1/3/0/5/130551210/1753406.pdf
    • http://southpawspetexpo.ca/uploads/1/3/0/6/130639084/visevoso.pdf
    • http://theorderoftheoak.org/uploads/1/3/0/6/130605219/9512316.pdf
    • http://hubengineers.net/uploads/1/3/0/8/130813859/zofuk.pdf
    • http://rnnext.net/uploads/1/3/0/6/130621836/saxekaduloki.pdf
    • http://n4rm3a.salon225.com/uploads/1/3/0/7/130776567/130776567.html#airline+icao+code+list

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a28.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A28 16204 bytes
font_01_sfnt_off00005206.bin
268007e58c01ee7d053bc7324130d3bc2a1a1b6b350f2155170c47c84074896a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5206 7924 bytes

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