Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce75c2bb08401323…

MALICIOUS

PDF

76.4 KB Created: 2021-04-05 08:34:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdcee746cfb6393a0d4e16ae5a127639 SHA-1: a8ce878e859bce36a0c982720ebda292779ab1f1 SHA-256: ce75c2bb08401323a000a4e2ee76aa17fb10fd7561804f78f18f1f762f467b86
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to link farms hosted on disposable domains, a common tactic for phishing and malware distribution. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detection confirms its malicious nature. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=practically+speaking+pdf+free
    • http://natorg.fun/summer_escapes_pool_walmart1mzqx.pdf
    • http://marinarus.space/gojibuwonirugepidubitoiri60.pdf
    • http://alteramaks.world/366619370254mfix.pdf
    • http://proita.fun/rezedu76een.pdf
    • https://cdn-cms.f-static.net/uploads/4422658/normal_60694b543126b.pdf
    • http://losmopaka.site/microsoft_label_templates_avery_5162o4v9d.pdf
    • http://biggymstoe.com/zapagipumufomadasaz4o6h0.pdf
    • https://cdn-cms.f-static.net/uploads/4471971/normal_604d037b96483.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_016d0f0fdff3417c881d44d58d44b463.pdf?index=true
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_23e15bb44cba47379b4639bdc9f33acb.pdf?index=true
    • http://pifixoga.epizy.com/synchronous_motor_and_induction_motor_difference.pdf
    • http://sajobovu.epizy.com/80108669136.pdf
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_122a614a861e48d08b567dadc52eaa5d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f0b4d49b-232b-4364-906b-3844105d48fd/how_to_make_a_fake_bookcase_door.pdf
    • http://xenamufilas.rf.gd/bukowski_libri.pdf
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_7bbd6062c3a04208930d5bf8afe45522.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b587d567-c0b7-4d06-8089-3a13f1f4e403/kenmore_vacuum_116_parts.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda3.bin
44d6c9e7536625efad1772eaf336d2d4509d0531c717afad893dcb2dd2bae2bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 5488 bytes
font_01_sfnt_off00010069.bin
57250568463162bc21ae37b26876b11461aa5fb4b3d9c5257adf03d3b48132c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10069 10620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.