Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d12dbf39481793…

MALICIOUS

PDF

44.2 KB Created: 2020-05-23 22:55:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e59c9d1b475db1cd37d5bb1506ea606c SHA-1: 7d5738dc5aad6c4d25bfb9a893b8dfe578f44796 SHA-256: d5d12dbf3948179373b5e1dd9a4d013f8fd738543bfd33a290315e7545fe1abf
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external URLs pointing to other PDF documents. The ML classifier strongly indicates maliciousness. The primary attack pattern involves redirecting users through these links, potentially to host further malicious content or engage in SEO manipulation. No scripts were extracted, and the document body is heavily obfuscated, limiting direct analysis of user-facing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://imosacorp.com/uploads/1/3/0/2/130274166/130274166.html#complete+guide+to+heraldry
    • http://mycoreproject.com/uploads/1/3/0/4/130476493/dadasibanifazidewov.pdf
    • http://caninesocialclubwa.com/uploads/1/3/0/4/130476229/fb9598473b0.pdf
    • http://poeticpalate.com/uploads/1/3/0/8/130813059/jozujorexozipef.pdf
    • http://msbr.ca/uploads/1/3/0/5/130539438/duwovulopa.pdf
    • http://peggededucationalconsulting.com/uploads/1/3/1/1/131164472/wekotelu.pdf
    • http://futurepeacefulfather.com/uploads/1/3/1/6/131636774/8a9997d585860.pdf
    • http://stichtingomechris.nl/uploads/1/3/0/4/130476885/xopodozajos_sulobuzejok_bozeva.pdf
    • http://winpinvestments.com/uploads/1/3/1/0/131070362/nujen.pdf
    • http://serenityrowe.com/uploads/1/3/1/3/131383227/zipoj_nolemub_vunig_kirowevinubev.pdf
    • http://michelyngjurasic.com/uploads/1/3/0/8/130874580/cb0b6268f68.pdf
    • http://womensrotary.org/uploads/1/3/1/0/131070378/volatujado-fugelupidejes-jupij-zaxexurunub.pdf
    • http://bloodsweatandshears.com/uploads/1/3/0/6/130621569/zadotilonawitanovom.pdf
    • http://malkocturizm.net/uploads/1/3/0/7/130739170/jawawexipoke.pdf
    • http://naturesedge-fl.org/uploads/1/3/0/3/130323952/fexabozokitale.pdf
    • http://gloriasunsetmusic.com/uploads/1/3/0/8/130874284/be0b8f68359a595.pdf
    • http://sjmarketingco.com/uploads/1/3/0/2/130291572/gasozedew.pdf
    • http://ejze.studio/uploads/1/3/0/7/130775950/488361.pdf
    • http://tpendleburyphotography.com/uploads/1/3/0/5/130590420/255953.pdf
    • http://garygoodnough.com/uploads/1/3/0/5/130543121/2706444.pdf
    • http://ibtrios.com/uploads/1/3/0/7/130775197/vodewuzupuw_kexobu_zenujajamip_sigawikodediv.pdf
    • http://31belviderestreet.com/uploads/1/3/0/4/130494636/5899919.pdf
    • http://fabricfrostingandfrills.com/uploads/1/3/1/4/131438225/daxokopuzipuwaruj.pdf
    • http://newformwork.net/uploads/1/3/0/4/130436181/2744923.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008023.bin
ef3d5b842b9750f301974f677f37e426e4d35674033e3178aeb8369d366a86f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8023 10748 bytes

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