Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ae02d886471903…

MALICIOUS

PDF

85.6 KB Created: 2021-05-17 04:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e9eef0be99cf0681456a638b35a37c89 SHA-1: 2f7ecb19b146f990441c09393269e664070713c9 SHA-256: a0ae02d8864719035896a19000d907d43e01eae3d77b17ab53617e9982ce4046
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, and a primary lure related to an audiobook. The presence of these links suggests the document is designed to redirect users to malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=halo+the+fall+of+reach+audiobook+free PDF link annotation
    • https://wupugosow.weebly.com/uploads/1/3/1/3/131382590/suranewugovaleb_sasebolev.pdfIn PDF document text
    • https://cdn.sqhk.co/memenewo/TjjjjEU/75555843608.pdfIn PDF document text
    • http://tukomibewi.getenjoyment.net/dapotufan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_60185d6322498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_60481ea621ce6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_605f807503d0d.pdfIn PDF document text
    • http://fanilobepewe.sportsontheweb.net/leramikedofigipikubojifuk.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/hdgejj9/prop_hunt_portable_mod_1._3._5.pdfIn PDF document text
    • http://badoxik.scienceontheweb.net/alphabetical_reasoning_questions_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_6027e9733660e.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/vijuji.pdfIn PDF document text
    • https://zinorenote.weebly.com/uploads/1/3/5/3/135349773/zelibup.pdfIn PDF document text
    • https://fifikasato.weebly.com/uploads/1/3/1/4/131437502/3003858.pdfIn PDF document text
    • https://nanagupuwaxa.weebly.com/uploads/1/3/5/3/135322083/fbb14c9.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxozamikoge/QEgcjcQ/birdy_properties_tenant_portal.pdfIn PDF document text
    • http://zavolofa.mygamesonline.org/introduction_to_logic_irving_m_copi.pdfIn PDF document text
    • https://rejaduwewuwuga.weebly.com/uploads/1/3/1/8/131856140/kopugisabo.pdfIn PDF document text
    • https://torovuzexas.weebly.com/uploads/1/3/2/7/132710592/5308416.pdfIn PDF document text
    • https://xajijalati.weebly.com/uploads/1/3/3/9/133997138/9293939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fca926fcc936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rujidafedisezu.atwebpages.com/platicas_pre_bautismales_queretaro.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_off00010fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC8 5096 bytes
SHA-256: d30b971ed5b674641d68192534c752a90b1b08e97b9cc350a93bba26ededd419
font_01_sfnt_off00012110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12110 11508 bytes
SHA-256: 60cedf9e8228c1cffafbca111f146323f3fbfbf65c4e58c22a5832c7aed12d71

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