Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05015580ab83a4d…

MALICIOUS

PDF

28.0 KB Created: 2020-05-08 18:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be2ee25adf9b8129c2c1ab720ebb1997 SHA-1: b4a0a9864fca072243bbf03aeee170bc78091661 SHA-256: c05015580ab83a4dd37fd1c726fba9f9838f9703deca93c269781120b981433e
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains obfuscated text and URLs, suggesting an attempt to disguise the malicious nature of the links. The primary attack pattern appears to be a link farm designed to redirect users to potentially malicious content hosted on numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://tieroneinspection.org/uploads/1/3/1/6/131637104/131637104.html#the+poseidon+adventure+2005
    • http://sbuildersinc.org/uploads/1/3/0/4/130435652/ed0514dd.pdf
    • http://blueheronscientific.org/uploads/1/3/0/7/130740342/supelakok_novamifapotav_rigeri.pdf
    • http://davisenergymedicine.com/uploads/1/3/0/4/130477170/260588.pdf
    • http://treeservicerockhillsc.com/uploads/1/3/1/6/131607023/8090384.pdf
    • http://harvestcityworship.com/uploads/1/3/1/3/131398324/22f68062e4.pdf
    • http://sandiegorealestateconcierge.com/uploads/1/3/0/5/130543377/tonidi_boputafezid_nunesubopejut.pdf
    • http://dnicholeking.com/uploads/1/3/1/0/131070115/2932905.pdf
    • http://holisticpaths.org/uploads/1/3/0/4/130483136/afb69.pdf
    • http://shopcode58.com/uploads/1/3/1/0/131070993/9257820.pdf
    • http://diamondbellranch.com/uploads/1/3/0/6/130605206/8751898.pdf
    • http://darrenhudson.me/uploads/1/3/0/4/130476541/7246201.pdf
    • http://southwest-led.com/uploads/1/3/0/5/130588270/7181713.pdf
    • http://therealdavidchoi.com/uploads/1/3/0/4/130435745/tubopumoseduli.pdf
    • http://emmabdigital.ie/uploads/1/3/1/6/131606134/maruwuxupisumoluv.pdf
    • http://wingsofhealing.global/uploads/1/3/0/6/130639121/xajamexewugowana.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005108.bin
f798609670a8646a1b57087ece84343241729469b9f45882b96a9d1eaf1b2ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5108 10532 bytes

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