Malicious PDF — malware analysis report

Static analysis result for SHA-256 85dcbc739e4fbde0…

MALICIOUS

PDF

38.1 KB Authoring application: Inkscape
MD5: e45136cbdb08a55d8ffd2e9a50cc8542 SHA-1: c65a433895b3d0c494d368ffaae5af728952c7d8 SHA-256: 85dcbc739e4fbde0aa83432ac0d03c066a7c30fe88ce2448ff756a45bd12fc98
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to other PDF files hosted on various domains. This technique is often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution through these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maison-bois-hietala.com/uploads/1/3/0/6/130640133/5909382.pdf
    • http://silbanamyphilosophy.com/uploads/1/3/0/7/130775596/f95235c5f44.pdf
    • http://dibbledabblemedia.com/uploads/1/3/0/6/130639139/4574100.pdf
    • http://amandajgordon.co.uk/uploads/1/3/0/6/130639537/23dda30a75.pdf
    • http://thelevelupshow.com/uploads/1/3/0/6/130620602/dalufumosopelu_ruwagusativuje_kojudiga.pdf
    • http://cathedraloaksnurseryschool.com/uploads/1/3/0/7/130738569/kusuvor_sazuweriwobev_dinup_menuvinegakuza.pdf
    • http://drbarrnd.com/uploads/1/3/0/6/130622012/1512060.pdf
    • http://agnesmusic.net/uploads/1/3/0/5/130544811/wexurugatasuk_popoxe_vogakagepetojep.pdf
    • http://www.gigapro888.com/uploads/1/3/0/5/130588714/0f07b0801950ba.pdf
    • http://amodernplace.com/uploads/1/3/0/2/130289577/7390597.pdf
    • http://mail.voluntarysectorgateway.org/uploads/1/3/0/8/130874385/suwigifonunad.pdf
    • http://michelledrumheller.com/uploads/1/3/0/4/130489247/9418268.pdf
    • http://x0940502xstreamtravel.xsideas.com/uploads/1/3/0/9/130969580/130969580.html#lr%280%29+parsing+in+compiler+design

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dc8.bin
6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC8 2864 bytes
font_01_sfnt_off00003ab3.bin
55ed0d979a9552f57f63851f0fed423c4d3a499d5332845f5e5596c12e0ba87f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3AB3 8564 bytes

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