Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dfd799908d12171…

MALICIOUS

PDF

70.8 KB Created: 2020-12-20 22:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3836a0a9e1cd79a4ce45703c7ce7d7fe SHA-1: 98af8384fb4bd64832ddb5f0a2e84091a62c01a9 SHA-256: 3dfd799908d121715f5e2d8d6312d99f568e315556e4519bff447e0c698771b7
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The PDF contains a large number of external links, suggesting a link farm or redirection scheme to obscure the ultimate malicious destination. The embedded URL 'https://trafffe.ru/123?utm_term=bar+boulud+nyc+dress+code' appears to be part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=bar+boulud+nyc+dress+code PDF link annotation
    • https://weradarodoruz.weebly.com/uploads/1/3/4/7/134744379/fezimi-sexotazumojok-vofamodevet-jolapevobu.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/a457b.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/bef2c9f1.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/9826265.pdfIn PDF document text
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/kefogufexanufigazule.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/694a8399-4510-4ced-82f5-05886e5999a7/lufawakusuvagizefifur.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/garekodaridawa.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/sadadijefet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abab065d-a98a-4385-a589-cc70e7ac18ce/47805700189.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/sociological_theories_of_deviance.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/chemie_formel_zeichnen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b0eeb8-0849-4c33-8ad7-be1f8f40f1f8/29158139011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e8a86a-9315-44d8-8c11-66dacd0981fb/81479751893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97505f0a-b8b0-4395-890f-98dba7aa772f/55576878136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56933c87-f1b7-4834-a86c-48dbca040c59/bound_by_temptation_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/99942581117.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/loving_tv_show_first_episode.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_off0000ca96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA96 4976 bytes
SHA-256: af5918583ebb9ff95b77a67ee41dc503e2ce05650577b7f5b3aac4ee62eb5312
font_01_sfnt_off0000db85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB85 11056 bytes
SHA-256: 794829aa39fc9c4d7bd59340c743657e54c66e9f48d4084b0e1315af223ab317
font_02_sfnt_off0001001a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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