Malicious PDF — malware analysis report

Static analysis result for SHA-256 68bc2144473d16b6…

MALICIOUS

PDF

60.1 KB Created: 2020-04-16 04:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 549e13fe2d46d8a301600609b3fe7450 SHA-1: 58747ffb74a6ce3e859e8aa0e96d8592cbaaefd6 SHA-256: 68bc2144473d16b6c667ea1407844f376b9ae908b109260af752056004d8bd74
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier with high confidence. It functions as a link farm, containing numerous external links to other PDF documents, likely to manipulate search engine rankings or distribute further malicious content. The document body text, though partially garbled, suggests a lure related to 'Keynote templates for school'.

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://carrieanneandjames.net/uploads/1/3/0/9/130969220/130969220.html#keynote+templates+for+school
    • http://bullyfreebuffalo.org/uploads/1/3/0/4/130436236/pefuvuvegif.pdf
    • http://swiftpropertymaintenancellc.com/uploads/1/3/1/0/131070006/jizizoxubemimabara.pdf
    • http://emboutique.net/uploads/1/3/0/8/130814774/dosupogerebagidul.pdf
    • http://bentleybuilders.org/uploads/1/3/0/7/130775657/60b1e58df.pdf
    • http://kcufti.com/uploads/1/3/0/4/130488975/varojorikona_jazivekudatewo_bidaji.pdf
    • http://leapsandboundstravels.net/uploads/1/3/0/4/130435960/3409567.pdf
    • http://allforkidsboutique.com/uploads/1/3/1/0/131070125/bavulu-movifad-linafuloref.pdf
    • http://selfdrivingcarwrecklawyer.com/uploads/1/3/0/6/130605080/vedadajutoxar.pdf
    • http://itsasecretblog.com/uploads/1/3/0/5/130551720/nixifefatevavogon.pdf
    • http://kathrinesteele.com/uploads/1/3/0/6/130621205/8cd75b042696e.pdf
    • http://rallyatlanta.com/uploads/1/3/0/2/130289549/zapik_terak_mejef_sesijivebatu.pdf
    • http://back40ministry.net/uploads/1/3/1/4/131407440/pogigugam.pdf
    • http://custom-created.com/uploads/1/3/0/3/130313383/rigikeras.pdf
    • http://chasingthebrunsons.com/uploads/1/3/0/6/130605380/pelenetirepop.pdf
    • http://alasimone.com/uploads/1/3/0/7/130740250/wevijezirerive.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_off0000c25a.bin
dd01634e2de9d106332c42879901ba3749ca31cd2285dad55d5257d4b9792386		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC25A 8280 bytes

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