Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d86a9e744093fde…

MALICIOUS

PDF

68.1 KB Created: 2020-11-10 17:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 74f536603927fd02cff6fc0b942e055d SHA-1: 4a2a63f244bd64466b2fc87fae83d6f5c237d90c SHA-256: 0d86a9e744093fde4b14076ba5f15e991a68cfb8efaacb42c9b1d126a68e4f9b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 pointing to a suspicious domain, likely intended to deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to game hacking, aligning with spearphishing tactics.

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?keyword=tower+bloons+defense+5+hacked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418556/normal_5f9a4c8160838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f92c7f18beff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5fa8914b9b3ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_5fa817df91f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f8fd480a92d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_5fa58b5190577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5f8b760ca4ecc.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/973e98b1-6622-41d0-b580-d51e95070153/kesebujobawan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09dc011-a9b2-4ec8-8eae-26b45a4fbfc6/hollow_knight_bank_gone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d58c0c-ed64-4aa5-8ffe-a846ec43d665/39520225230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062be6c2-06e4-4418-b618-24694b8fe569/kugelidimelekirogejovule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdc1f07b-8a1d-4a0e-bd44-fe40526feb34/kidukesalij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a16e89-41db-46a9-8082-8cb289b9fb12/pigesisumova.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_off0000c052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC052 5140 bytes
SHA-256: 2ac4b6f48c5a0be794261a15080037a85d24749105f5412494df81003c1fb968
font_01_sfnt_off0000d1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CF 10708 bytes
SHA-256: 9cb0869ae75159ed32715859829756d4b4aa713251cac13a83f3f68310cb3f7f
font_02_sfnt_off0000f573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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