Malicious PDF — malware analysis report

Static analysis result for SHA-256 640b3d1fd928307d…

MALICIOUS

PDF

36.5 KB Created: 2020-05-16 22:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8a16950cb55457cdc6595a3bf29a07b SHA-1: c3afd9fa2e2ee657d1c647c45b9ce12638be82b4 SHA-256: 640b3d1fd928307da8ee2b7721f05b1c77be84a0b9af0d26f534e363b155e28d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many of which point to other PDF files, suggesting a link farm or distribution network. The document body, though partially obfuscated, contains text related to a TV guide schedule, serving as a lure to encourage users to click the embedded links. The ML classifier strongly indicated maliciousness, and the presence of many external URIs supports a malicious intent to redirect users to potentially harmful content.

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://thelatinaimpactfund.com/uploads/1/3/0/9/130969470/130969470.html#tv+guide+schedule+for+today
    • http://mindfulnessmatters.online/uploads/1/3/0/3/130379063/masux.pdf
    • http://thebarnatcrookedpinesfarm.com/uploads/1/3/1/4/131437102/pemam.pdf
    • http://sparkinganvil.com/uploads/1/3/1/6/131636664/fopixebomuwanewifa.pdf
    • http://ziyak.com/uploads/1/3/0/2/130289222/576b3fb553.pdf
    • http://ollieandindy.com/uploads/1/3/1/4/131407310/4eb56afa97c72d.pdf
    • http://carwashservicedadalas.de/uploads/1/3/0/7/130775142/bilelevolum.pdf
    • http://cateringbyricklaxton.com/uploads/1/3/0/6/130620494/linifu_vudimoketibot_telisegesegi_gudupibeko.pdf
    • http://alldayprincess.com/uploads/1/3/0/5/130538997/xisopobaxos_lazapowikoreruz_jogivolen.pdf
    • http://classnstyle.com/uploads/1/3/0/2/130272344/fanopulajepupu.pdf
    • http://falleveningwithbbbs.org/uploads/1/3/1/8/131872281/zexekaxesapal.pdf
    • http://teambuildingingeorgia.com/uploads/1/3/1/4/131438211/1205988.pdf
    • http://divinegrowthmedia.com/uploads/1/3/0/8/130874197/kipulofijesolawig.pdf
    • http://canninish.com/uploads/1/3/1/3/131381369/sewulisusad.pdf
    • http://perfectbalancenutrition.net/uploads/1/3/0/6/130621511/723ec7f8a03a447.pdf
    • http://sassypantsfashionboutique.com/uploads/1/3/0/2/130292089/4573875.pdf
    • http://abigailklassen.com/uploads/1/3/0/4/130475997/tuwedezomo.pdf
    • http://nicksarno.com/uploads/1/3/0/5/130543472/momavogowurote-bujusukobev.pdf
    • http://capemayusa.com/uploads/1/3/0/5/130550682/1014784.pdf
    • http://safemilhousing.net/uploads/1/3/0/8/130814020/4744852.pdf
    • http://chosenfamseries.com/uploads/1/3/1/4/131483020/641a26637.pdf
    • http://ritetime-transport.com/uploads/1/3/1/0/131070792/pusujolimobu.pdf
    • http://raygecandy.biz/uploads/1/3/0/5/130539078/tebawolimaxafitop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006147.bin
8be2cb87c74c6c23a4e329d6c270e6ba277fae69858cb612b54ef72877de96ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 10880 bytes

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