Malicious PDF — malware analysis report

Static analysis result for SHA-256 1492567d7bf1b9c2…

MALICIOUS

PDF

69.0 KB Created: 2020-11-24 09:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d93810d04509ab43ee84f8a0fbd673a3 SHA-1: ecef72a0cec37609e12fe8117dc7a6597ab99e01 SHA-256: 1492567d7bf1b9c288e76123fd598d1328fe8f7e65faf8ad633ac0709d04d7c1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with at least two pointing to suspicious domains ('trafffe.ru' and 'kibutudevitage.weebly.com'), suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure strongly suggest an attempt to redirect users to malicious content.

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://trafffe.ru/strik?utm_term=corrig%25C3%25A9+centrale+pc+2015+physique PDF link annotation
    • https://kibutudevitage.weebly.com/uploads/1/3/4/4/134499349/57436.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f92c73bc5ceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f91269d6dde4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_5f9b6bb989692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_5fa8717f1b96c.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/a3302832-1bb1-4f25-a590-e148e56bc47e/triptico_animales_en_peligro_de_extincion.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/fupasaxojulop.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/9530050370.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/ballistic_performance_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/timogevojunowupite.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/transformers_animated_prowl_instructions.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_off0000c9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F8 5920 bytes
SHA-256: 63b995151e6c6e278be923b6039ed6645dcb5068c22e3684f8f8e2357a3b0b8b
font_01_sfnt_off0000dde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE3 12508 bytes
SHA-256: 5bdf8cbed172b6e369acd8869746ec1100aec7b5e96e1c09471c67952a3bb0b9

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