Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb82ed101c7978c…

MALICIOUS

PDF

72.6 KB Created: 2021-02-26 14:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4dde72a091d009c6978c495b271db63d SHA-1: d9fecd768b77cb976dfbd16daef54c909e89465f SHA-256: 4bb82ed101c7978c2807eaaf55f5d68d790b682b56875a642f5a018a2319dba6
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. The embedded URL 'https://gimoguvi.ru/strik?utm_term=how+to+use+a+blomberg+washing+machine' and another URL 'http://tifizifojaf.iblogger.org/63133346803.pdf' are identified as potential IOCs. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://gimoguvi.ru/strik?utm_term=how+to+use+a+blomberg+washing+machine PDF link annotation
    • http://tifizifojaf.iblogger.org/63133346803.pdfIn PDF document text
    • https://cdn.sqhk.co/kojariwirip/iffpjhh/carson_city_hotels_with_pool.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/home_warranty_wont_replace_furnace.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/how_to_write_an_essay_for_high_school_application.pdfIn PDF document text
    • http://kersita.fun/tisirivagonavokolosotaxwfm7o.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/namijoxi.pdfIn PDF document text
    • http://believes.space/95562319666flu67.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/o4Riasr/bozufagirudasamobige.pdfIn PDF document text
    • http://datingdate.site/coal_asia_holdings_inc_annual_reportfm94s.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/1yggid8/one_deck_dungeon_pc_review.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/MaZzhft/shelter_insurance_claims_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/jbn0Pie/83927398414.pdfIn PDF document text
    • http://ersoil.fun/vulaxonaporiderimoxaoqy5x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gigapexolazet.rf.gd/gojutewajuzew.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/zenaxoligekusa.pdfIn PDF document text
    • http://guxajez.rf.gd/zabivuvu.pdfIn PDF document text
    • http://zalowakudedakov.rf.gd/amazing_grace_trumpet_sheet_music_easy.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6A 5408 bytes
SHA-256: b345cb1cb3a72dbcd84550ce9748e893f411d2db1308011986fd828fe2a2440b
font_01_sfnt_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 11196 bytes
SHA-256: 7897c1a195873d9b627ab331466bc882ba99f50e040d159d97cea8b019542c54

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