Malicious PDF — malware analysis report

Static analysis result for SHA-256 31841b82f6a42bea…

MALICIOUS

PDF

73.0 KB Created: 2021-02-27 03:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fe394371b3f404dd6127ad3f3cb5822b SHA-1: ae8e9c9033a683e2f5ac88dc96ab68125610bdaa SHA-256: 31841b82f6a42bea793da047c29ba6032e337a2593c409a378f51e2a2999fc46
186 Risk Score

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://pelibifir.ru/wix?keyword=national+forensic+league+honor+society PDF link annotation
    • https://cdn.sqhk.co/sofilita/lgdUidN/used_clothes_wholesale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/PRkbwje/cossacks_ww2_british.pdfIn PDF document text
    • http://tafasizogir.22web.org/20661442451.pdfIn PDF document text
    • http://fovagenifozemub.iblogger.org/31478364007.pdfIn PDF document text
    • https://xufodikufidu.weebly.com/uploads/1/3/5/3/135382923/8450095.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/CjjO6Fl/mupen64plus_ae_n64_emulator_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nolugavetiri/6gjigXH/40160035183.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/kxWjfjk/qs_world_university_rankings_2020_aerospace_engineering.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/je6isFr/dezizegufakivobexaravug.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/egegfjb/26166754851.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/90lgdhd/game_center_app_iphone_x.pdfIn PDF document text
    • http://gusitolife.iblogger.org/lutemira.pdfIn PDF document text
    • https://mexejafulid.weebly.com/uploads/1/3/4/8/134880369/3182321.pdfIn PDF document text
    • https://povewagefafede.weebly.com/uploads/1/3/4/8/134888055/5a43041794a8b4.pdfIn PDF document text
    • https://cdn.sqhk.co/zudipoje/jdigP67/891840985.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabaxuzadowepep.rf.gd/pafuwi.pdfIn PDF document text
    • http://kozuwuwupoxofi.rf.gd/jagewevezasufirazo.pdfIn PDF document text
    • http://movuveso.rf.gd/punifutamukatenudilix.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_off0000e237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE237 5212 bytes
SHA-256: 7ff6a519a472d9f3e856d60c9d5af8e65dbfe66406e1cdfbce99b2e258fab55d
font_01_sfnt_off0000f401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF401 10228 bytes
SHA-256: 87c327ecf48f6025018a8aab4b5dfde2cd01c473c0359767b87eaa88a7c7ea83

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