Malicious PDF — malware analysis report

Static analysis result for SHA-256 4112b54b08c1c8f0…

MALICIOUS

PDF

79.1 KB Created: 2021-03-25 18:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 203463558086cc03207fb8ea02479afb SHA-1: 64b69e14ece6ba6c1df391fb3a9403ad3e9a2405 SHA-256: 4112b54b08c1c8f021241ca860ae938c02b68d659077d0ee36a6a57726dd15ef
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body and heuristics suggest a lure related to payment or bank instructions, directing users to external URLs for potential credential harvesting or malware download. The presence of 'cmddv0b0.pdf' and a URL containing 'utm_term' further supports a phishing or exploit delivery attempt.

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/strik?utm_term=plantronics+voyager+legend+pc+software PDF link annotation
    • https://cdn.sqhk.co/sigidezok/Br6hcic/double_masters_draft_booster_display.pdfIn PDF document text
    • http://kamini33.ru/gebigozaxunifivurn1jk.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/vomawagebalosamhgno1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_6046c476d2320.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/dgghhib/car_crash_games_beamng_drive.pdfIn PDF document text
    • http://keep-travel.com/software_architecture_design_patterns_exampleswahi0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449998/normal_5ff9dc20728f3.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/ehiiimN/wovifejova.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/samisuxobuxiki102e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423137/normal_5fcf826010d24.pdfIn PDF document text
    • http://tameeniraq.com/how_to_hard_reset_android_phone_using_cmddv0b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529977/normal_5fe9cb0e9731f.pdfIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.fiIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_2fe81d02425b4e74b4896ef0572279c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wulagisi/fallout_4_dlc_companions.pdfIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_4a88d93c8b0146bdb60416cf0b622d8d.pdf?index=trueIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_12fa7e1c916a427985d6e9715e9d003e.pdf?index=trueIn PDF document text
    • https://849cba27-c1c2-4801-a47f-514a08c45c3c.filesusr.com/ugd/7f7a2c_bc999436d128477ea5a3e2fdec69686e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/30868948919.pdfIn PDF document text
    • https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_508665d6c8064d27a9a4e8e457b1c252.pdf?index=trueIn 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_off0000f396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF396 5580 bytes
SHA-256: 742e19f74ee76d17bd07a60b8a2e6f780c24936503146b4b3645473b88b4bff6
font_01_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 11224 bytes
SHA-256: 2872b60edc64b7fa3e7443cbb5d9bdbf2215ec33604074d50ecc3713fdc5c3e7