Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff44dac8df444f5c…

MALICIOUS

PDF

67.1 KB Created: 2021-01-08 17:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: edcfa829c5c65bbe45fe155735dd543a SHA-1: c561fe9db21e4e07ac4e4d5d95a7a98c809bd515 SHA-256: ff44dac8df444f5c679d2d4ba10c2b7c9ff01076a452c23155797de7f061da03
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, when visited, likely leads to further malicious activity. The document body, though heavily obfuscated, contains references to 'Wagon wheel table glass top' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://trafficel.ru/123?utm_term=wagon+wheel+table+glass+top PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5fbd049e4d71e.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/gidJa0Q/87910562239.pdfIn PDF document text
    • https://cdn.sqhk.co/filumabit/jeiaS3Z/business_analysis_tools_in_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/janiehe/35123073154.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/9a504d84-3009-42d4-939e-1d7051e9285e/70589629770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b542b8d4-33c5-4275-a7db-4322b51565af/9984406261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b93a85f-8e2f-48df-8775-78d63a0f6a38/wenevuvoxoda.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/3294668104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f44236-6270-435b-b7ff-56bf4d6f98c8/meteor_shower_august_2020_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7b905e-d301-4c17-b09a-9fb357d80959/harlon_l._dalton_horatio_alger_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a70aac-9cd7-4714-b3ab-68010b43869a/64956842598.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_off0000bb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB59 4968 bytes
SHA-256: 0270ec49ea9848925a10eb2df5e8fa8e07fe385603cdcafccfbe45713e12c8de
font_01_sfnt_off0000cc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4E 11320 bytes
SHA-256: 95a65f29179696e90693b010c3bb9fef0afbe061e059fbe065d48d58db862131
font_02_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361