Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e1b6cf5f4560ce…

MALICIOUS

PDF

63.8 KB Created: 2020-11-21 22:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2f097e162b15dfca98b0968ce87ca1a1 SHA-1: ebce90f141b1e5ad1b2069236dd79b0424687062 SHA-256: 79e1b6cf5f4560cecfa8a45a414e36eb9ac5e8ae531dfdb4765a2652eaa1dcc5
156 Risk Score

Malware Insights

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

The PDF file contains obfuscated text and is flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It includes an external URI pointing to 'trafftec.ru', which is likely part of a phishing or scam campaign. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting an attempt to drive traffic to various sites, potentially for SEO manipulation or further malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=tissot+1853+perpetual+calendar+manual PDF link annotation
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/a2fcf7f21f3be74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f9279c88959e.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://uploads.strikinglycdn.com/files/69c81a4f-08c9-4fd0-bc61-56007d4363b1/83378408299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0026bd6-6e47-493e-88a8-36116bc4c925/bsf_revelation_lesson_10_day_5.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/datiligosukobesokarenewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b3244b-f5e6-4ba3-84af-297569e08009/pawakofajurag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d59c6c5-1103-4684-987f-a32e055d4f71/31130197695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f885242-2e9e-4d7f-af09-646b8f583f5f/ssat_middle_level_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/69540266774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81cbb5f1-3e20-4abb-baca-5cae0f858b4a/36715077270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdeb4789-3a22-4090-9916-90b2ada7c121/wagitosibofod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac307fb3-bf87-4ef8-ae63-0dedc5321ffa/apk_mod_movie_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9f5a6f-0637-451d-bc79-59d9c5f3e8f9/85139623372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88869f89-b02b-4695-8b56-71e26624a163/timutokeja.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_off0000ae98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE98 5584 bytes
SHA-256: b5857ace5132346338ffd50055825eaf0e9ce8a4f2699f19c2f500656c537434
font_01_sfnt_off0000c170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC170 10116 bytes
SHA-256: 2d13b329e53c7d010dba1ac950a67ae0414cf24c487401d7509b39fbc4540c4e
font_02_sfnt_off0000e3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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