Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf699917f542be4…

MALICIOUS

PDF

81.3 KB Created: 2021-03-16 10:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: eab665a08dec2899e6c51924ec5792d2 SHA-1: 09b26ebf5628ef9c38a23f9342da65727b9f064a SHA-256: acf699917f542be47ab9cebef7ed3741c0b94ffe7764288e43591f445a0689e6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

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://maypoin.ru/award?keyword=alkene+addition+reactions+pdf PDF link annotation
    • http://baxusajatos.sportsontheweb.net/wameruxan.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/cgfETij/54010438477.pdfIn PDF document text
    • http://xiguzot.22web.org/radubixinorelebuni.pdfIn PDF document text
    • http://lizaxexepe.22web.org/how_to_repair_a_troy_bilt_pressure_washer_pump.pdfIn PDF document text
    • https://cdn.sqhk.co/kasunelebak/o5YeZjb/twitch_fernanfloo_god_of_war_3_guia.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/the_new_psycho-cybernetics_audiobook.pdfIn PDF document text
    • http://mufinofol.scienceontheweb.net/9377488063.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/gxmhdig/need_for_speed_most_wanted_2005_ps4_controller.pdfIn PDF document text
    • http://kaxidabifibag.iblogger.org/93740482001.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sewujajapivix.onlinewebshop.net/electronique_numrique_bascules_exercice_corrige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc5171bf-9c7f-4bbd-8a62-113f08fd0573/rupefewarereretaxow.pdfIn PDF document text
    • http://nazifaba.rf.gd/dictadura_augusto_pinochet.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/wound_debridement_cpt_guidelines.pdfIn PDF document text
    • http://xotopunutogor.rf.gd/wamulolipuzuzanediweki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b01b46d-8a1a-4d47-997d-71fb7bba6f1a/gaxoxubolubabaxej.pdfIn PDF document text
    • http://bidejepeko.onlinewebshop.net/rujurojagoludo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932f6017-1a44-4b8b-bf2b-c38fbf672c50/89515178046.pdfIn PDF document text
    • http://xafofeb.epizy.com/antigone_questions_and_answers.pdfIn PDF document text
    • http://dufeniwa.rf.gd/legally_blonde_jr_ireland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e096618-2b5a-479e-a095-b7a1f3cd9719/senelasav.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_off00010025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 5200 bytes
SHA-256: 1ba1dd96167133516526c8fc58a0cc6e749cb06a17a7ac3631c9aca99e7e73e1
font_01_sfnt_off000111ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EA 11308 bytes
SHA-256: 19d06e2220fea11629dede1b79a0552c42af360320c4c7a644bb9e3a2a9d3a12

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