Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7787a185a160ff…

MALICIOUS

PDF

74.6 KB Created: 2021-02-27 00:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 394115905222235834e2cd44c4a835b6 SHA-1: 73355838ba57ce94b851b4494b287c729ebdd7e8 SHA-256: 3d7787a185a160ff07bdcdfd2236b3cb6b199e383622237d8f695c92266a17de
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external links to other PDF documents. The ML classifier and ClamAV also identified it as malicious. The primary URL, https://botokaw.ru/wix?keyword=deferred+billing+code+for+roamans, suggests a potential phishing or SEO manipulation tactic. No scripts were extracted, but the structure indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/wix?keyword=deferred+billing+code+for+roamans PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408174/normal_5fc84e425e1ed.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/powermate_5000_generator_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_60221936d3d48.pdfIn PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/7240546.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379230/normal_5ff830881a284.pdfIn PDF document text
    • https://sosijujanakuf.weebly.com/uploads/1/3/5/3/135387992/nakokamunu-vasusapikim-wukazabiz.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/80823988966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427519/normal_5fe00f74266dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_600b5b129c8b8.pdfIn PDF document text
    • https://tagudosalanuku.weebly.com/uploads/1/3/1/4/131452811/750834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5fe63382e8a9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_602a9a4d5d54a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://litorow.myartsonline.com/79009918497.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/basc_3_srp_sample_report.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/99084957009.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87B 5188 bytes
SHA-256: 25845e865d8aed5c52812709add0fe966024769401a7875f748164f24f62ecf5
font_01_sfnt_off0000e9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 10836 bytes
SHA-256: deaddd609db1efd3b248d78f4d4de3362fa43619de316f65c748a4559579360a
font_02_sfnt_off00010efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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