Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6c3156b99fb315…

MALICIOUS

PDF

38.0 KB Created: 2020-05-18 06:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53dda4565e6c1e319d4c14c9651db7ce SHA-1: 6c71a34c5e5f8c4c682f91818e8b23d1d3e9545b SHA-256: 5b6c3156b99fb31593f6851b893094b05b582733e879ad1d494308d86619ec11
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute additional malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://jhrpropertyltd.com/uploads/1/3/1/0/131070982/131070982.html#davos+weather+report
    • http://datacenterhitec.net/uploads/1/3/1/0/131070890/6545670.pdf
    • http://palmcityeye.info/uploads/1/3/0/9/130969573/a2188.pdf
    • http://luna-coaching.com/uploads/1/3/0/2/130289799/zinagima-vujexixirekekek-xarajugevo.pdf
    • http://armisticecreations.com/uploads/1/3/0/6/130621488/798abc843cc.pdf
    • http://carfidante.com/uploads/1/3/0/4/130476339/muredisafunadabuweva.pdf
    • http://avaparmelee.com/uploads/1/3/0/6/130604511/bf49799673861.pdf
    • http://sarastenger.com/uploads/1/3/1/1/131164027/3675828.pdf
    • http://coachabrahams.com/uploads/1/3/0/4/130435751/zated-paleli.pdf
    • http://shaneaustinsimon.com/uploads/1/3/0/4/130435666/5736997.pdf
    • http://sherwoodarcherspto.org/uploads/1/3/0/2/130289283/6608768.pdf
    • http://onpitroadracing.com/uploads/1/3/0/8/130873841/lutogijuba.pdf
    • http://life-differently-abled.com/uploads/1/3/0/5/130590029/b8fffce0d.pdf
    • http://lumiereweddingphotography.com/uploads/1/3/0/6/130620471/8621509.pdf
    • http://niblick2.com/uploads/1/3/0/4/130476575/830ae82674bda53.pdf
    • http://michiesdogmeatsandtreats.com/uploads/1/3/1/4/131437138/2b82a14.pdf
    • http://millikenfamilyfarms.com/uploads/1/3/0/7/130776509/2a7d10.pdf
    • http://ryanlimagames.com/uploads/1/3/0/6/130605244/fepobenunaze_lasenebut_rulakalapimowu.pdf
    • http://thehappiestholidays.com/uploads/1/3/0/5/130588575/1fd153958c506b.pdf
    • http://myparadisetravel.net/uploads/1/3/1/4/131453256/ganokofojija.pdf
    • http://hillview.estate/uploads/1/3/0/8/130813504/00d6276f.pdf
    • http://kenna-kitchen.com/uploads/1/3/1/0/131070351/ad799d.pdf
    • http://nikitaono.net/uploads/1/3/0/2/130289392/buxipagewa.pdf
    • http://moorescleaningservice.net/uploads/1/3/0/5/130540193/8393598.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_off0000672c.bin
586d741dd5ef94774a39534c15850374808e974dd622874b0def9ed93c8db0c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 10872 bytes

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