Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf09b3fc17490ad2…

MALICIOUS

PDF

78.1 KB Created: 2021-02-12 21:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dafcc8ede3d4a241c150f858bcbbc1ab SHA-1: ab133a708e264c7bd095f14f87f543b1c966f5c8 SHA-256: cf09b3fc17490ad2967bacd6f4079a3c65bbf29b6a589e49d23288b23db061e7
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wb?keyword=que%20es%20el%20abandono%20infantil%20pdf PDF link annotation
    • https://cdn.sqhk.co/gawukale/hgxBWrU/all_sims_4_cheats_pc.pdfIn PDF document text
    • https://kanefudejezem.weebly.com/uploads/1/3/6/0/136056225/e234e2cd567.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawomo/bujeW7X/alphabet_matching_cards_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/ejb0cib/kanilavidure.pdfIn PDF document text
    • http://dkshlyap.ru/wenudevenetilipijebisopohedz.pdfIn PDF document text
    • http://igcopyrightclient.com/guwarigegowosituvok7lyb2.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/xumizanirosojubu.pdfIn PDF document text
    • http://cardioactiveitalia.site/damaripaxc7sq7.pdfIn PDF document text
    • https://tatidadimu.weebly.com/uploads/1/3/5/3/135383915/xigubinikeregibifo.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/bYZgjhh/tower_defense_simulator_wiki_skins.pdfIn PDF document text
    • http://texno3ua.com/tedenuxupmsp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/action_verb_worksheet_for_kid.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/6805195340.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/bubble_blast_java_game.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/48996336195.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_off0000f40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40A 5140 bytes
SHA-256: 372b2a8d19f75fb5a24ac31d7b8d62c10db992b46adf2d378a46fc59a28c4de3
font_01_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 11292 bytes
SHA-256: 89c10b5e77a6bc7ad32c7ed7aec733e793ca87dfd4b1df3ad02daa29e506f495

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