Malicious PDF — malware analysis report

Static analysis result for SHA-256 873ebe9f5599cea3…

MALICIOUS

PDF

65.4 KB Created: 2020-12-24 15:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1ff8a09b55018fb8cf536dc42b452938 SHA-1: 49912a88e4c384ce4cb83e63fc8e104fa9d4dea1 SHA-256: 873ebe9f5599cea3289b5c7f26ccc78c559b2fd76c7ba1ed06bbdfe136f90f59
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload. The document body's content is garbled, but the presence of 'Valse d' amelie sheet music accordion' suggests a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=valse+d%2527+amelie+sheet+music+accordion PDF link annotation
    • https://xoxamotanu.weebly.com/uploads/1/3/4/6/134653835/buxek.pdfIn PDF document text
    • https://cdn.sqhk.co/dokederajo/jGhgSjb/76152668228.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454558/normal_5fe2d8b162f1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485689/normal_5fc7d16e412a5.pdfIn PDF document text
    • https://gitilavoviko.weebly.com/uploads/1/3/4/5/134586482/rinivamizewa-vadilufewasufex.pdfIn PDF document text
    • https://cdn.sqhk.co/fokivetezabu/DRicfUh/titan_quest_multiplayer_quests_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_5f9f350672484.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374207/normal_5fe3d70a880fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486997/normal_5fdab0ebd07a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422368/normal_5fa1de7d09ab3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00910775-c6ac-4ccc-b3d7-53c8a5120572/nibutuxuzekasipuxivol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa595106-02b7-48d2-8674-973ea59d8ad9/56744411475.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10D 5176 bytes
SHA-256: befc3aa5074bdd343ec011866af2e0cf8a66b71b9b5b8279840bc579d1f12a1a
font_01_sfnt_off0000d287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD287 11348 bytes
SHA-256: 2789d0e2e5f601b84dd86a06b828a22cb5eb196029c4626a306937f2350b2f9e