Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b9c2ddaf151a99…

MALICIOUS

PDF

82.3 KB Created: 2021-03-03 09:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 64cc82c6923af4c6db8c3ec5659af5a5 SHA-1: c5ffedcf13f0245d6d8d95e4baac2e07dfa01d19 SHA-256: 41b9c2ddaf151a9986d6a9f34365864a5d80fef5b43d538a7c2e6f0aa8dcda72
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://pelibifir.ru/award?keyword=public+relations+for+dummies+2nd+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/gepumenujeme/RADhjcN/musica_instrumental_de_los_80_para_escuchar_gratis.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/star_trek_enterprise_season_4_episode_21.pdfIn PDF document text
    • https://mitewowepo.weebly.com/uploads/1/3/0/8/130813710/00125471f6.pdfIn PDF document text
    • https://boxizegovabore.weebly.com/uploads/1/3/1/3/131379280/4517397.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/UZFpDjh/43821212823.pdfIn PDF document text
    • http://baxijemapuzoxu.22web.org/nirelesiropiwudedu.pdfIn PDF document text
    • https://cdn.sqhk.co/sesudegaruta/eQsTlCs/easy_payday_loans_to_get_approved_for.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hhiicTW/game_offline_cho_iphone_5s.pdfIn PDF document text
    • http://fomilexavekol.22web.org/pitinatulila.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sivisalatifaba.rf.gd/bebitabuzufobajix.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/losapugataberizazivopud.pdfIn PDF document text
    • http://bexiguxiluk.epizy.com/gabagegalomini.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/best_movie_tv_shows_apk.pdfIn PDF document text
    • http://mupisogedosido.epizy.com/aurelia_metals_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/9894623822.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_off00010612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10612 5572 bytes
SHA-256: 9cc4daa5671a2513e29288b5def251c9cb7a4e9290a2daf2d2e6ab1827b7c0aa
font_01_sfnt_off000118ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EE 10324 bytes
SHA-256: cc91baa599be0548e97e363c5e26b1387c00c4a2351dd1ea87fb2ffc65b24d93

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