Malicious PDF — malware analysis report

Static analysis result for SHA-256 59fdf65cf1f1a689…

MALICIOUS

PDF

79.1 KB Created: 2021-03-07 00:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bc3c5405c4c9b06cbc7af009ffd7a9bb SHA-1: 9c750a30b88477cd1a940080ce5d2a4995f0a2cd SHA-256: 59fdf65cf1f1a6890840949111b3be536ea0143d32aed35c7ec1df348cebde99
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on `https://mezovuduw.ru/wix?keyword=wikipedia+manual+transmission`. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it as malicious, suggesting it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

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://mezovuduw.ru/wix?keyword=wikipedia+manual+transmission PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448103/normal_5feb6a99ebfe0.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/MZXzzgh/43619556661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_602abc8354477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_603592b12f6c1.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/v1geEDF/fatagusavarasarumopogimuw.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/zTjjjcw/picapart_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_5fdc1ab5c295a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464862/normal_60195b8807db3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d541f0-fbba-4fa4-ba65-751d99211780/roxaxiguxagisamaroj.pdfIn PDF document text
    • http://surotatifezuxe.rf.gd/atheros_driver_installation_program_windows_10.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/lajoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b09c73b-c21e-480a-8cc0-dda48d32236a/tp_link_tl_wr841n_v11_driver_router_tp-link_tl-wr841nd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca90007a-e6e3-4263-a942-1d7e018c23aa/cosco_infant_car_seat_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fec9178c-3e86-473c-9659-a1625d01c059/13101240455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35103404-6ff8-4eb3-9fdd-b93d0f7a32e4/51013037821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c615a7b3-1bb3-4cd0-b38b-1d2dfa179b99/zutugav.pdfIn PDF document text
    • http://saluwagasa.onlinewebshop.net/dell_precision_t5500_maximum_memory.pdfIn PDF document text
    • http://vufobaratoja.epizy.com/85072538104.pdfIn PDF document text
    • http://rupedixinej.rf.gd/bejepinufumakepupofu.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/waterpik_water_flosser_parts_walmart.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_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 5184 bytes
SHA-256: 673851f889237b1c08da71ff8fb7ac5b41d1b6e80d69177b60d6a4eec7d15e6e
font_01_sfnt_off00010c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C97 10032 bytes
SHA-256: 12a0353c702d8391a92591cd8374c0929dffe59f6c23f4fc6ba3b95290466b1b

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