Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9237d48e3a0461…

MALICIOUS

PDF

73.2 KB Created: 2021-03-04 10:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3119b0a8b2c87d697b19c70bcbea3881 SHA-1: 6ee912ee07c081abdd25e7e8ece354de62d21b7a SHA-256: 6f9237d48e3a0461ee55fd858f6371cb6b708ee642a450c3db97566c13e58954
186 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam tactic. The presence of a URL with 'viper+car+alarm+customer+service' in the query parameter indicates a lure to potentially malicious or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://seumenha.ru/strik?utm_term=viper+car+alarm+customer+service PDF link annotation
    • https://lowarimubabop.weebly.com/uploads/1/3/4/7/134712264/2579305.pdfIn PDF document text
    • https://liwifaxuje.weebly.com/uploads/1/3/0/8/130874244/geduxinazexam-vopix-ruwobonuw.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/what_programming_language_does_arduino_ide_use.pdfIn PDF document text
    • http://vorecan.fun/candy_fever_2_level_5285aezi.pdfIn PDF document text
    • https://guxojifupu.weebly.com/uploads/1/3/1/4/131438233/mojijataxepelu.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/a6375e0f88d509b.pdfIn PDF document text
    • https://kuxaxamolexude.weebly.com/uploads/1/3/4/8/134869233/redif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_601c701db7a71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374364/normal_5fe3a5849239e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_60290da236802.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/super_contra_7_nes_game_genie_codes.pdfIn PDF document text
    • http://0fruit.space/342524546926tut9.pdfIn PDF document text
    • http://shoop-fh.ru/sajavutigatohcmhh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486775/normal_60014525091ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480155/normal_5fceabf64ab95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_601f3203c24e6.pdfIn PDF document text
    • https://lopenedaxi.weebly.com/uploads/1/3/1/6/131606218/leluresugorora.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xolavozezimodan.onlinewebshop.net/what_kind_of_government_did_the_soviet_union_have.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 4880 bytes
SHA-256: 9b148b540d88523d4d034a85f2571ef2c5bb3b0a9ecf4b347bff4507f194c650
font_01_sfnt_off0000e635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 10228 bytes
SHA-256: a15106ecdf8002c85d40b5ae77807ee6144981981ffd5fdecbf59a3d3135ae6f
font_02_sfnt_off0001095e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f