Malicious PDF — malware analysis report

Static analysis result for SHA-256 947039544401391e…

MALICIOUS

PDF

71.4 KB Created: 2021-02-25 16:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 8cf868ad570250382e52d5e9ab45a928 SHA-1: 15b8731876b30055672ece7108a56af1113ad2f6 SHA-256: 947039544401391e86375f5afa2f6e045faca3e4e123cdb9b13b47de8755dcc2
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a high concentration on disposable hosting and potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scamming purposes. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites.

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://bologen.ru/wix?keyword=piggie+pie+lyrics PDF link annotation
    • https://cdn.sqhk.co/zutijujes/ighaVgj/condado_beach_umbrella_rentals.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/hQhiwYc/93673523896.pdfIn PDF document text
    • https://cdn.sqhk.co/lifudidu/9idjdgd/mi_home_apk._xda.pdfIn PDF document text
    • http://9gusevshop.website/hp_wireless_printer_offline_windows_10jqe60.pdfIn PDF document text
    • https://cdn.sqhk.co/xegigujatefa/KhjjghV/10305942558.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/bicnJPN/verizukikovowupud.pdfIn PDF document text
    • http://theandyhong.com/big_ideas_simply_explained_ecologyvenbz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483075/normal_600a980b4b2ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489593/normal_5fecd1a2a1754.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/Ggi0tQn/bumok.pdfIn PDF document text
    • http://starconflict-game.ru/roosa_master_db_injection_pumpbaktx.pdfIn PDF document text
    • https://cdn.sqhk.co/kulabokirow/pngijdl/building_draughtsman_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/fpDjbJr/stick_war_legacy_mod_apk_unlimited_upgrade.pdfIn PDF document text
    • http://hookup158.fun/fenifuxelibociufx.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/eigjiM0/betituvuberipelefepal.pdfIn PDF document text
    • https://cdn.sqhk.co/bamikalagov/ahajegd/72213819241.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/jawusawar/vulanabemiretu.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/rare_books_cataloguing_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/47100911271.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_off0000dcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFE 4992 bytes
SHA-256: d81d62666fc98d494f01891374bd3209bc8f18bf5fb4641939ff5fe1d3e36750
font_01_sfnt_off0000ee1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1F 10032 bytes
SHA-256: a10739d8c6e12b1596b220424e67228330885667dfe0d73e2d023d41ff522690

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