Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57babb12eacf5eb…

MALICIOUS

PDF

70.6 KB Created: 2020-11-13 05:34:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7ceddf22580ec9c00b332332475da473 SHA-1: 7acd2b8fae7b1006728f5682ecdd764ab4aafc6f SHA-256: c57babb12eacf5ebff99a21fa99c5e569507c03a37600906edcc0c2eb3c91e76
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that suggests a cracked software download, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a malicious document, likely intended to trick users into downloading further malware.

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://trafffe.ru/strik?utm_term=stardock+fences+3.05+crack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f8732d2a0770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_5fa75560c4e6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387713/normal_5f90f4e9c40a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5fa303b39c1a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417990/normal_5f9b8bfb97c6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5fa0bafcafae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_5fa72dd9dea7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f934f19615a6.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/52ad78a5-afed-4f5b-8e90-7da12988b6d8/dometib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd75232e-313b-4261-b90e-3538a2dceaca/driver_parallel_lines_downloads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/821ca475-10ce-46d2-9a20-8833e11b364b/46876409056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e625608d-4f09-4b52-8f0b-7d8a70accfd9/jalazojewon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/935ed47b-741e-4d40-b40d-7d422b0958c3/dark_souls_3_faith_strength_build.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2de40d-b3ce-4e3a-92e8-36cc04d2dba0/xagosubawedif.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_off0000cf01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF01 5612 bytes
SHA-256: 8f28274e9f21b92881a8af6ffa8c35eadbe36dd07b269d64546a2a7cf17e5240
font_01_sfnt_off0000e236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE236 13720 bytes
SHA-256: 227ad25f69b5b0b9bf25ac4d937eab7a173e908ce53f06a03ba533e00c75adcb

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