Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c01029e48f1975…

MALICIOUS

PDF

68.4 KB Created: 2020-11-25 19:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da4f370b6a888d2a1b4ad1715d3bcc44 SHA-1: 51693b334d97cd4707c4a5e282d582d2865ed89c SHA-256: b5c01029e48f1975c6ab4904b78bc844185a69344b7bd8a81fb2d1425d6b941f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, 'https://traffking.ru/123?utm_term=daily+high+club+box', is flagged as suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=daily+high+club+box
    • https://kinefevemupopit.weebly.com/uploads/1/3/4/6/134631160/wutukebogemifoz.pdf
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/73e1a0c0272660.pdf
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5fa4e4cc6784a.pdf
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f88474d64941.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1b909344-0223-4e2b-8281-4a7706c76743/the_secret_life_of_trees_free.pdf
    • https://s3.amazonaws.com/jemazejodep/81052701828.pdf
    • https://s3.amazonaws.com/jenisozazewubo/vakuvivodizagirufofotu.pdf
    • https://uploads.strikinglycdn.com/files/055d3383-804a-4ccb-b2d5-da0c57644f86/kojodonikinodana.pdf
    • https://s3.amazonaws.com/mozedijiz/ridifibusixezolamasuput.pdf
    • https://uploads.strikinglycdn.com/files/ffe57fab-23b7-41e8-b072-4b42f4ee98be/exercicios_probabilidade_ensino_fundamental.pdf
    • https://uploads.strikinglycdn.com/files/b27fc8b3-0b82-4f9e-b02e-f1c356560602/farberware_5_cup_coffee_maker_manual.pdf
    • https://uploads.strikinglycdn.com/files/31d2b6cd-50c4-42f2-977f-f81e526b354a/2956004050.pdf
    • https://uploads.strikinglycdn.com/files/fd2d5f61-06a4-4925-b8a5-e99c9364ad6d/jarekojipid.pdf
    • https://uploads.strikinglycdn.com/files/93b67171-09c1-4ec0-8ea8-8cc8eb147b21/craft_of_research_4th_edition.pdf
    • https://uploads.strikinglycdn.com/files/307ffd2b-82ae-45b6-83b8-407e9821f9fd/bevitodir.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c393.bin
16b3419ccc26390f4d4c0eb54c0a4c143f43920c1da9f0980183b224f16ad691		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC393 4676 bytes
font_01_sfnt_off0000d387.bin
f853e23096f48f73bbf3c8d1392c8564d6579a32faf3f3d41b996557e28d0030		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD387 10352 bytes
font_02_sfnt_off0000f704.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF704 4324 bytes

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