Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c5fe1c51323f3e…

MALICIOUS

PDF

74.8 KB Created: 2021-01-05 07:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: abbc170cd6a3f61836141bc9d17c32f9 SHA-1: a917aa43f0665b43d788fa9eb13a0708b1a4075f SHA-256: 58c5fe1c51323f3eaa940a0d7873377ddc99c001d8dc018c23af427cda2f3ec3
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 URI pointing to 'traffset.ru', suggesting a lure for users to download or interact with malicious content. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than a standard document editor, and the presence of PDF-specific heuristics further supports its exploit-based nature.

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://traffset.ru/aws?utm_term=free+solitaire++for+apple+mac PDF link annotation
    • https://cdn.sqhk.co/dudumadopole/y8ghOlt/70628410674.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/MHnndic/kajukozarujupuzuni.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/giirgjU/38983793734.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/hegh38S/82691132527.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/hhgc8jg/zerudamokamekikame.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/igigjdL/shark_world_evolution_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sizabo/57189618906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d4abde4-9a6a-4ca1-a96a-474d4909ef86/wiwotabek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89360136-f69e-49cd-a0dc-888690da511e/gta_san_andreas_sevime_hilesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0fb85c3-f2a9-4936-89c2-cec2d98f7f57/99582349799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff11bdf-f199-4d0c-a5a5-28f3811debda/waxebol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2765e717-9510-4fc6-9ed3-617aa91b034c/bivoregufesojisokabozokel.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_off0000e7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DE 5116 bytes
SHA-256: 04a613f878f26e7a127f59d40ba5d1ace05f277f47444bdbbc7150d36a9cd949
font_01_sfnt_off0000f936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF936 10848 bytes
SHA-256: 786ba0a56c364478a9bfb4f57556aa38664d92510784d6db5979192ac8c976dd