Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7e1523674e05bf…

MALICIOUS

PDF

74.7 KB Created: 2021-03-16 10:16:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa43fb4aed2a3c72b7ab214773704ddd SHA-1: d5d760c015587b364a345dee430be303b4cffbae SHA-256: 6d7e1523674e05bf98c29942b73dd9a08d5976cab416dcb9fff5acaab514b40f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=spectrum+guide+limited+mode
    • http://xawegap.mywebcommunity.org/a_dolls_house_themes_download.pdf
    • https://wuxigato.weebly.com/uploads/1/3/2/6/132680835/sipepasukiser.pdf
    • https://static.s123-cdn-static.com/uploads/4392463/normal_5ff7dbd1e64e3.pdf
    • https://cdn-cms.f-static.net/uploads/4471512/normal_601e5a952ee70.pdf
    • https://static.s123-cdn-static.com/uploads/4478414/normal_5fdcc487bc21d.pdf
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/nomibu.pdf
    • https://cdn-cms.f-static.net/uploads/4373997/normal_60178631df2d6.pdf
    • https://static.s123-cdn-static.com/uploads/4376382/normal_5ff069faa6a43.pdf
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5ffc690cd3027.pdf
    • https://static.s123-cdn-static.com/uploads/4468289/normal_5fe3fcfd2d1fe.pdf
    • https://cdn-cms.f-static.net/uploads/4481275/normal_601988b0a5075.pdf
    • https://cdn-cms.f-static.net/uploads/4481291/normal_604e35d51750f.pdf
    • https://static.s123-cdn-static.com/uploads/4479942/normal_5fe2eae0dd753.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tamegebodow.epizy.com/cadbury_bubbly_nutritional_information.pdf
    • http://busagawama.epizy.com/momozivujimadogesuxiji.pdf
    • https://uploads.strikinglycdn.com/files/ed06f4b3-00ba-427d-a635-ff8161c21c78/gupadim.pdf
    • http://ruxemad.epizy.com/kadiperevo.pdf
    • https://uploads.strikinglycdn.com/files/29bdc9d1-6ac8-436a-93e1-148005c6d037/50034983289.pdf
    • http://nogobixa.epizy.com/83891372043.pdf
    • http://gevapugono.atwebpages.com/suxumijomevalab.pdf
    • https://uploads.strikinglycdn.com/files/3938a7e4-eb64-40c3-a50b-85e43ef86d6b/schlage_model_fe595_manual.pdf
    • https://uploads.strikinglycdn.com/files/bc42994e-3e39-40c0-b782-07061cdd82ef/matebitesubid.pdf
    • http://jisijuvod.myartsonline.com/12636972456.pdf
    • https://uploads.strikinglycdn.com/files/60178bc4-f1e2-4fa5-8bae-aa9e77cda457/9235785746.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_off0000e76d.bin
ca568cf9a55d85b548184efa440ebf00648306ec235b8872dfdc735434bab0a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 5108 bytes
font_01_sfnt_off0000f8b8.bin
c41c3b6275214780106188bf93d6f2efd149cbf7f98bba21bfbba46af4b25b1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 10692 bytes

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