Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc67f993ea6f20b4…

MALICIOUS

PDF

69.1 KB Created: 2020-11-18 03:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cc0ba00a44fa015e49f111e5ee505f62 SHA-1: a6b1002e39d3daa263b2678e862ba5c075287a8c SHA-256: cc67f993ea6f20b42cd5d6d7a4a7b4e02546cf9da22d9790086f1e24e4b07e69
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'utm_term=minecraft+1.8+9+mods' parameter in one URL indicates a lure to attract users interested in specific content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafftec.ru/123?utm_term=minecraft+1.8+9+mods PDF link annotation
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/kofeguxozup.pdfIn PDF document text
    • https://vabofofed.weebly.com/uploads/1/3/4/3/134337048/sozoxiponiku-duxigagakudaxor-doweke.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/6097937.pdfIn PDF document text
    • https://gasilarax.weebly.com/uploads/1/3/4/5/134595303/905d6f14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474980/normal_5fad596e01278.pdfIn PDF document text
    • https://tetabiga.weebly.com/uploads/1/3/4/0/134097499/voperawibosepavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_5fae8a9c36111.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/bddebe19-a79c-4235-8d49-9b3fe096b625/47801485927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbde261-a7ee-4791-ba5c-27d0ccfa918f/beboxiwusanobukikegoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/807ac82a-2868-4f7f-8446-281c55f6e68b/kevuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d3601e-8e07-4e95-bd22-19648b08fe0f/biblia_de_estudio_thompson_en_linea_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/32749258675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a143cfb3-0819-4177-a3c7-993d6567a358/4835544720.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_off0000d2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C0 5572 bytes
SHA-256: f605652a3cfa92246306f737cc54c113b5a3d9177d75a4c1411d66427f0c4b48
font_01_sfnt_off0000e5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B7 9860 bytes
SHA-256: 05224d686d7da98f4d5b27aacb0c5f8207f92f467c0740007e3d15597d31a71c

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