Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06ecaaf13c9ccc9…

MALICIOUS

PDF

66.6 KB Created: 2021-04-05 10:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6e73a549917282a0478da5903b888bc5 SHA-1: 5af5233dd7bdd26468574c919fc440a979a24937 SHA-256: f06ecaaf13c9ccc9b4ff4cfaf9dc62a1c9ff4e9001dc965e5d67b4232c6b65cf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/strik?utm_term=how+to+fix+bowflex+revolution PDF link annotation
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/sevibikolitumuk.pdfIn PDF document text
    • https://cdn.sqhk.co/liguvikozo/NjcgciF/botefunitenatuki.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/K1jdgeF/choice_of_kung_fu_sbenny.pdfIn PDF document text
    • http://f1l3download.site/the_standing_stones_book_of_shadowsvxnqz.pdfIn PDF document text
    • https://fogakorix.weebly.com/uploads/1/3/3/9/133997140/1489339.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/MlgeZia/79837467260.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_600fd58050374.pdfIn PDF document text
    • https://jenifamizoj.weebly.com/uploads/1/3/5/3/135319667/1468824.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/6Tjhfij/zubegugap.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/9hhiedO/59346816684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_6062c92c43d10.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/juvumu.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/Kgdkgea/puvupasodev.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvuvidova/jdVqi0u/78254478442.pdfIn PDF document text
    • http://getveran.site/21918009464z3n5g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_60277c009b472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448550/normal_6026c2c765aff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satudifin/xewone.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/1649905465.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_off0000caf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF6 4692 bytes
SHA-256: 4ab956c08b07e724975c3f36ae6a68024211fc53beb099b17b9877b3959d86cb
font_01_sfnt_off0000db17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB17 10036 bytes
SHA-256: 0a2e2f4615a5af144d40163daadfc863ba174d6e488124d18b84d28fdf28a3ca

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