Malicious PDF — malware analysis report

Static analysis result for SHA-256 215e4a11bd89cafe…

MALICIOUS

PDF

70.5 KB Created: 2021-02-10 03:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8b88718cca8b354e4b696dbb4edae40c SHA-1: 523704c031021d1c20f7ca4d763ef449e328341e SHA-256: 215e4a11bd89cafecf8b912b5366c74869fe8e730c73e858326c1a7eb1925773
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/aws?utm_term=remand+report+by+assessing+officer+meaning PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466366/normal_5fc836b89515f.pdfIn PDF document text
    • http://top-agent.ru/unreal_conditional_exercises_with_answerskdi3x.pdfIn PDF document text
    • https://dexajuvado.weebly.com/uploads/1/3/4/4/134470202/xidupanikesetafigora.pdfIn PDF document text
    • https://mipolokipum.weebly.com/uploads/1/3/5/3/135399848/1535047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470232/normal_601e4d38b1c6a.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/zutujekavuzuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421770/normal_5fe6d59786e73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5fe78ce71fffb.pdfIn PDF document text
    • https://sexanugujox.weebly.com/uploads/1/3/4/2/134266496/87272515943b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_60230e78b00a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416496/normal_5fd3cecbc75b9.pdfIn PDF document text
    • https://xofilovinavi.weebly.com/uploads/1/3/1/3/131379248/miganefefalimam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5fed7e0f58b09.pdfIn PDF document text
    • https://wobosiwax.weebly.com/uploads/1/3/1/6/131607505/9758891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gerosopidazab.rf.gd/bed_wars_hack_mod_apk.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_off0000d644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 5692 bytes
SHA-256: e1c9c10518ff563cfccb92cf4bbbb49193c0f5093814b2276a1537df2cbce95a
font_01_sfnt_off0000e98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98E 10344 bytes
SHA-256: f022b0bb8bc6420d6f56fdc9730f797d38185fde2b5217f39ddb0044de428bfd

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