Malicious PDF — malware analysis report

Static analysis result for SHA-256 8605c0a7d268319d…

MALICIOUS

PDF

41.9 KB Created: 2020-03-26 13:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a181269cea3b4617e306f1854c23373a SHA-1: 29c3766ad4ddb222304259052b9794f6c0119c0d SHA-256: 8605c0a7d268319dadb20d89ff339f897e7d401b93e963e8a4cca4aa62728c42
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many with numeric slugs, characteristic of a link farm designed to manipulate search engine rankings or redirect users to malicious content. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings, reinforcing the link farm attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://teaganmurphymusic.com/uploads/1/3/1/3/131379380/131379380.html#que+es+marco+conceptual+en+un+proyecto+de+investigacion
    • http://foxcitieselectrolysis.com/uploads/1/3/0/4/130435906/kefuraralapeg_jebel_jilavebodazif_tolujeb.pdf
    • http://findmoreroom.com/uploads/1/3/0/7/130739240/1315747.pdf
    • http://dominikschuster.com/uploads/1/3/0/7/130739039/pedatolik_rebijefilebal.pdf
    • http://7400marshall.com/uploads/1/3/0/3/130379391/064c04e48edb9.pdf
    • http://autoimmuneguru.com/uploads/1/3/0/5/130589252/2476088.pdf
    • http://teamrockyou.com/uploads/1/3/0/4/130435503/2742639.pdf
    • http://815eastspringsroad.com/uploads/1/3/0/8/130874237/19336168bf608.pdf
    • http://hostmaster.guitarland.it/uploads/1/3/0/8/130813395/delaforud-jeropobupu-lelufulemajape.pdf
    • http://www.classiccars.global/uploads/1/3/0/4/130476814/bfac037.pdf
    • http://sommerjacob.com/uploads/1/3/0/5/130588906/rejojewi.pdf
    • http://sassyssmoketique.com/uploads/1/3/0/8/130874087/keset.pdf
    • http://sevencedarsdesign.com/uploads/1/3/0/7/130776279/6f52857.pdf
    • http://e-cigs-warehouse.com/uploads/1/3/0/8/130874583/9642812.pdf
    • http://apiecefulhome.com/uploads/1/3/0/6/130604361/nemulevebufelusog.pdf
    • http://bemytutor.org/uploads/1/3/0/3/130323967/rurijatomexawotirej.pdf
    • http://bylaurieb.com/uploads/1/3/0/6/130622047/rejugenogubiwup.pdf
    • http://buildingalifeulove.com/uploads/1/3/1/0/131070940/zilonolirube.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_off0000777b.bin
2b1176abf2412be84bbf2d035d1a2f310afdbc80a3fef433d39d7a046eb1ec2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x777B 8956 bytes

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