Malicious PDF — malware analysis report

Static analysis result for SHA-256 7042a80baf5c037c…

MALICIOUS

PDF

66.1 KB Created: 2020-12-15 14:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8469ed1c9bb35ef33cffa4062eb8b401 SHA-1: 9b0521644025c56355220e6f1d56ea5549ada659 SHA-256: 7042a80baf5c037cb735efd6acdc23aa8b6eade665eb68357032d586086d8b80
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it is part of a link farm designed to manipulate search engine rankings. It also contains an external URI pointing to 'traffset.ru', which is likely malicious. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://traffset.ru/123?utm_term=large+glass+containers+for+flowers PDF link annotation
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/e1f2b21.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/99d9cbb3-568b-4c11-b7b7-bd1fcef5ffdf/church_history_books_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd15af11bc573bbd2f78cc/1606227376385/69743479029.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1a4b57d0c8f249d460ce3/t/5fc4f5c0e6d49a06bb2e4406/1606743491669/area_of_complex_figures_worksheet_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/39158708412.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/ada_dental_antibiotic_prophylaxis_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/xoliv.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/checkpoint_endpoint_security_management_server.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/ashirvad_upvc_pipes_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/allen_answer_key_tallentex_2019.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_off0000c733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC733 5084 bytes
SHA-256: 3d02f716bc1ef6e19d9144fdb11c6a31e20ac320fd2d5295dc85eb1aa74d313e
font_01_sfnt_off0000d8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A8 10448 bytes
SHA-256: 8c9317e897a73807bffbabcf712e568e7b4314329f866b690d0b5035f0c91ec5

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