Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f01c03382dee769…

MALICIOUS

PDF

73.5 KB Created: 2020-11-13 18:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 84e1a909708667fe2f353c544ac88c6b SHA-1: 16f5826172909eaee75738a11f9e7051c5c50d91 SHA-256: 2f01c03382dee76906e675a87675224cb56072817f3ef896d71d44f2bbd7d365
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on external domains. One such URL is https://traffset.ru/123?utm_term=delta+tail+betta. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure suggests a link farm designed to redirect users to potentially harmful 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://traffset.ru/123?utm_term=delta+tail+betta PDF link annotation
    • https://ruwalabipuges.weebly.com/uploads/1/3/4/4/134465281/vuxulali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461250/normal_5faa2210ccc45.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f8b81bc595dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f907e12975e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f9bf2e5e46c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_5fa9a8687afa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f9e6b8a93d22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5f9f276fb70c4.pdfIn PDF document text
    • https://lapufetugez.weebly.com/uploads/1/3/4/5/134599929/sovabada-tofomelov-fenojamap.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/1932eae6-aab8-4be5-8f5f-2e409ec564bd/57384222389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23184074-d188-4a17-b3a6-e0aa0c1235f8/24247811094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae0a662-1e82-4c5b-b8e7-f4cec936ad58/dupupulafinubomejud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a733074-f5e7-40e8-9c4b-11bc2fde0d2d/47532141182.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_off0000e631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE631 4544 bytes
SHA-256: b182f5fd696f8c19be1b31f7c8c496fd435fa9781a7c560e73ebacefcdd2bc79
font_01_sfnt_off0000f5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BD 10480 bytes
SHA-256: bf5aaf29e5f5b526e8980384146458b94774906d599f80a851348988ed5ae087

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