Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96202e52c620f78…

MALICIOUS

PDF

115.3 KB Created: 2021-05-02 00:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fd226b2e73a97894d937dd0f4aa2ecec SHA-1: 727ab1a414990a4f363b3385d115ec0f9735b9ce SHA-256: f96202e52c620f78a7bad0b031933c196896ede964fcaa9c47f5310fd92803d4
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://xezojetit.ru/strik?utm_term=cyberpunk+2077+update+1.05+size PDF link annotation
    • https://cdn.sqhk.co/wafifovuwel/ibgchcz/72042487436.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/iygfMid/40447343293.pdfIn PDF document text
    • https://vuvofazomegudej.weebly.com/uploads/1/3/4/3/134329778/fd05c0e72c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375194/normal_5feb0ac1b030b.pdfIn PDF document text
    • https://fopisurotow.weebly.com/uploads/1/3/0/8/130874034/fonozireje-jazava-sinobavapomili-bowivadixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5fe7a80f5eb38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_606000a606e3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374211/normal_6000e5c377108.pdfIn PDF document text
    • https://zizetorusiwewiw.weebly.com/uploads/1/3/5/9/135990502/8567087.pdfIn PDF document text
    • https://cdn.sqhk.co/mazinatefoso/iigjbCW/little_big_city_2_old_version.pdfIn PDF document text
    • http://lonemap.medianewsonline.com/aneurisma_cerebral_2020.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/mupamejo-nukuvumepojos-buneparu.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/hvt9mgj/lopasosinegofe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db85bec-e2f4-4069-a70f-f087ccd81290/que_son_titulos_de_credito_nominativos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4635c35-167b-428f-8d68-31c2cb7ffe1a/the_magicians_lev_grossman_hardback.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87c42f6-64ac-4873-98f1-029c49bdd91e/guxilopapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e755eea2-e90f-408b-b59b-6081214287bc/diablo_3_necromancer_leveling_build_season_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7f43d2-2ef5-402d-ae1a-7c0a9476013f/mind-boggling_one-minute_mysteries_and_brain_teasers.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/antiarrhythmic_drugs_medicinal_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7299aa1f-39d7-43be-9f73-f96ac4005bd3/what_channels_are_included_in_xfinity_basic_package.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D73 5744 bytes
SHA-256: 93ab314f75d40fe7ce1f6910b633feba018f97da4bd4636d6110505ae9490fbe
font_01_sfnt_off0001812c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1812C 11540 bytes
SHA-256: 663b39b29c82c44f2b356f4c09064a1e98e1422db1c13426e2e77292f286cf8e
font_02_sfnt_off0001a85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A85E 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd