Malicious PDF — malware analysis report

Static analysis result for SHA-256 7198acfbbf7dbe9f…

MALICIOUS

PDF

37.9 KB Authoring application: Mobipocket Creator
MD5: c1045b3747250331e6d7ea188d364eaa SHA-1: 977b1829d816c692274a7129bb00ead537ef7e8d SHA-256: 7198acfbbf7dbe9febe168b750aa46fca4775a0f9ddd78ac1e086f4116b2d6c9
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external PDF files hosted on various domains, indicating a link farm or redirection strategy. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://nationalautoindustrybackgroundchecks.com/uploads/1/3/0/6/130604366/zinufebotepov.pdf
    • http://nationalcasinomarketing.com/uploads/1/3/0/5/130540172/801089.pdf
    • http://mx.lesliealane.com/uploads/1/3/0/5/130551349/wiket-zuzov-mobugave-dojuwukowatib.pdf
    • http://kurzyhs.info/uploads/1/3/0/6/130622048/wukuxiruvurujezaf.pdf
    • http://www.theflyingpigfarm.net/uploads/1/3/0/4/130476129/43dea2d114.pdf
    • http://floatingorchards.com/uploads/1/3/0/7/130740008/0fb37309571309.pdf
    • http://mihome.sydney/uploads/1/3/0/3/130323110/zanamur.pdf
    • http://sobreruedas.tv/uploads/1/3/0/4/130483537/1aa616eb.pdf
    • http://trafallets-jakt.com/uploads/1/3/0/5/130550665/nazisubixig.pdf
    • http://nikkimichelleandthecosmiccollectivemusic.com/uploads/1/3/0/3/130313784/dowal.pdf
    • http://motionzone.org/uploads/1/3/0/7/130739714/b3d7871d4f57.pdf
    • http://jeanne777.com/uploads/1/3/0/6/130621124/riretamizufisibela.pdf
    • http://johnhenryfox.com/uploads/1/3/0/4/130489706/1350344.pdf
    • http://suplevitsaudeanimal.com/uploads/1/3/0/6/130604505/titofodexum.pdf
    • http://torrentwfg.com/uploads/1/3/0/7/130775883/6a12ca16e.pdf
    • http://cdplatinumproperties.com/uploads/1/3/0/7/130739351/6064511.pdf
    • http://tacticalvalkyrie.com/uploads/1/3/0/3/130324044/4341640.pdf
    • http://www.tricobrighton.co.uk/uploads/1/3/0/5/130588153/wuzadakevevabujofas.pdf
    • http://ghememore.com/uploads/1/3/0/6/130604231/42ef874c924dd6f.pdf
    • http://nwlaxshack.com/uploads/1/3/0/2/130272853/zifakoke-jijonon-nujefe.pdf
    • http://slaten-wedding.rominastiebenphotography.com/uploads/1/3/0/6/130639821/130639821.html#exercise+bike+post+knee+replacement

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003627.bin
268dcfae1edd8703944d065d9286072f32ab268032ae0a3fcf3ee2cff19d3c88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3627 7336 bytes

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