Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8c562ee26d6c75…

MALICIOUS

PDF

62.5 KB Created: 2020-11-18 10:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c6d4acd80c16ff4159e0d311d6185d9a SHA-1: d9f641ed7f4b083963b6e81ab5c620e8f72530cf SHA-256: 0f8c562ee26d6c758b217c3fa1f92b06a454a6cf316c28276f95d61312b230ab
156 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 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 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.
  • 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://traffking.ru/strik?utm_term=fly+away+home+pink+zebra PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f8e38d091ea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f9372e689574.pdfIn PDF document text
    • https://koverirenupoma.weebly.com/uploads/1/3/4/7/134747520/8cbb66701a39298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f978d826c3fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487626/normal_5fb3fe5807dc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_5f979ed9b4507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f9b0117aa273.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/pagigupeji-budud-titefovix-dukutosuxutebas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f892b402a0cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_5f97c3bd60128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5fae5b13f277c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f8b96791c02a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/228f5d72-9f59-4975-9f77-957b973274b9/24420992275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf5674c-23ef-4f6e-8701-35ca16ccabba/21070195956.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CF 5284 bytes
SHA-256: 7f9030d625fcdb55fc222c6f877af95cb2fa6f30fd3ee3706bf755aa6c959cd1
font_01_sfnt_off0000cabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABE 10112 bytes
SHA-256: 92ea32a895c48c8f1f2b1cf2f4e695ad2b4982752dca15b1aa816585fed50434

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