Malicious PDF — malware analysis report

Static analysis result for SHA-256 eade51deff4c0ac1…

MALICIOUS

PDF

61.8 KB Created: 2021-01-04 23:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: edf18716a381b9aca66fc1500ca48754 SHA-1: d22bdfa481e633a80a3c0b31fe7b07326aad176a SHA-256: eade51deff4c0ac1d987d13d74c00719ef691e9c1700eae6fe1fece7d5addb78
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm or SEO manipulation scheme, with a high ML classifier score and ClamAV detection confirming maliciousness. The embedded document body mentions 'Omnia fishing logo', suggesting a phishing lure. The primary malicious URL identified is trafftec.ru, which is likely used to host or redirect to phishing content.

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://trafftec.ru/123?utm_term=omnia+fishing+logo PDF link annotation
    • https://rinavotonig.weebly.com/uploads/1/3/4/4/134477757/317c7edca.pdfIn PDF document text
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/2925411.pdfIn PDF document text
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/tebegabixek.pdfIn PDF document text
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/4785908.pdfIn PDF document text
    • https://zopatiselinijil.weebly.com/uploads/1/3/4/7/134758238/viwifokakadodog-zukojazenitad.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/a1bf7fa9-61c6-4eda-aeb9-a4181165b8e0/14865137567.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/csu_morgan_library_study_room_reservation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f36b6e4-7112-4245-8491-f01683e68fcb/fuvabirewemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0719a15f-cc63-4db6-8b35-e350625484ea/jejibexarivu.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/25293518687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f7f2b2-7918-4eea-b020-299b7af9b4a5/64809939497.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_off0000b60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60B 5112 bytes
SHA-256: c628683405a39a4caf8ef2ce4a30119d90cb1cde9abe39f4550ddde4541ed735
font_01_sfnt_off0000c74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74E 10376 bytes
SHA-256: 2a4ab4fc896ced8a37689095cf1482d82f29df7ca01a3d86a1dd5bd547998371

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