Malicious PDF — malware analysis report

Static analysis result for SHA-256 7390d82fe648e8a1…

MALICIOUS

PDF

69.7 KB Created: 2020-11-09 23:12:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c74ca90afe7311bc7c53c9c551f5d66c SHA-1: c5e02da1a4e4f2ff51f53336ab06db3f0383bf91 SHA-256: 7390d82fe648e8a17b509a3b2c604d9235004ea7d15af6c5fa44a1c1a65a72f3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'trafftec.ru', which is flagged as suspicious. The PDF structure and embedded content suggest it's designed to trick users into visiting this external link, likely as part of a phishing or malware delivery scheme. No scripts were extracted, but the presence of external URLs and the malicious verdict strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?keyword=shamrock+shuffle+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450158/normal_5fa5edacd2efb.pdfIn PDF document text
    • https://bomikuwutivibi.weebly.com/uploads/1/3/4/5/134598741/386486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_5f9ea1933e1a5.pdfIn PDF document text
    • https://makonajarozov.weebly.com/uploads/1/3/4/3/134341931/lopegunod_fitobunik_vinimivi_vamisumineb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jimugivos/bowunifodavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31eac41d-0870-4d44-bbad-e2ab4702baff/4416525800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5785e170-8440-4e71-abdb-fcd72ab9a2fe/lamibinibozozimekud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a609e3-b6d4-4ea7-bfb6-c2ac3f0f4f3a/gezivigenewizisutemuva.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/nobegoduxexodaluzejite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f89f3c1-30da-4243-b6c8-0620481753b0/48048905911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79432d90-1d91-4393-b7d3-d372d30dffa2/74181547834.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46C 5208 bytes
SHA-256: 63eab7b7e1e4b35bb8b0a487d8fec66b7720b11f111d13d5167c6eca86848d09
font_01_sfnt_off0000d613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD613 11228 bytes
SHA-256: 4be62861b8d378ae1d18cb336fa14372c2022c0d0d91f8d55e6a868184f44d52
font_02_sfnt_off0000fc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC55 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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