Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b69b82de136811c…

MALICIOUS

PDF

57.9 KB Created: 2020-11-25 17:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71621454a4502a0dae936ee33d5da195 SHA-1: 1d61f026f83aabb8d86c42dac3d7ea53c44af463 SHA-256: 5b69b82de136811c76a9c4b1085db3001138f9788a379e87aa1b676f7113018b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=pink+polka+dots+background+design
    • https://cdn-cms.f-static.net/uploads/4417523/normal_5fb943a2e59e3.pdf
    • https://cdn-cms.f-static.net/uploads/4472494/normal_5fb5981b8c8b4.pdf
    • https://cdn-cms.f-static.net/uploads/4423460/normal_5fa451eec90a1.pdf
    • https://cdn-cms.f-static.net/uploads/4491725/normal_5fbce3b99a92d.pdf
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f880bafec279.pdf
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5fa50b002e689.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9bd4f487-640d-4697-8a64-69c339b2917b/pawep.pdf
    • https://uploads.strikinglycdn.com/files/6393be24-3053-4568-a2db-bd653439e4ed/98239299152.pdf
    • https://uploads.strikinglycdn.com/files/55b4c4b4-d8b7-4a9c-b304-a9abfb071990/c_how_to_program_9th_edition.pdf
    • https://s3.amazonaws.com/pazovugal/jobevorejedesozivorusekez.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aad5.bin
e7511b31e7fcc95071b2fa6eef46cc119c111806ccf0f7d707767eefafac5477		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD5 5448 bytes
font_01_sfnt_off0000bd66.bin
cdd37964f006b8084f42f0a47c597f958c0732ef3a239d442885d602574d8704		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD66 8836 bytes

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