Malicious PDF — malware analysis report

Static analysis result for SHA-256 335c25bf59092770…

MALICIOUS

PDF

72.2 KB Created: 2021-01-01 02:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c042ab57ead59a36e071d0ff50ab1073 SHA-1: 7d3289b49897a932762f6ec29107b4f3df7618fc SHA-256: 335c25bf590927701315787c111e6d83846d33d0db4e79fc66820b0db4df1222
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The presence of PDF-specific heuristics and embedded font streams are common in malicious PDF documents.

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/strik?utm_term=war+vs+zombies+games PDF link annotation
    • https://cdn.sqhk.co/mubafazus/hcjjidj/66209333851.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/nalifij/zotuxugapesile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7459e06-19d8-4277-af68-79c4f3f220b0/fozagisubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245a46d1-be72-4020-b25c-367a25a7a037/94186602575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cad31cd2-8e42-4eec-b057-1023a8132793/gotaferas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef940da-50a4-48ca-a8a8-844e66bd4584/4863719359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c55a277-33d2-49fc-b042-c817db82bf37/fepekuwasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f2c968-f130-4043-95ff-348736230d7c/mudakapevig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80632db4-9157-4bae-b04b-6f2d460149f5/15400125557.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/abortus_usu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fbf588-5417-4d7f-8d9c-1c59bd1804dc/home_depot_credit_report_code_25.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ce7836-e23b-4921-8b18-a13c7f89ca52/artillery_sidewinder_x1_manual_mesh_bed_leveling.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_off0000deb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB4 5236 bytes
SHA-256: 0ce6f7544b9346c08bddd1e3fc8651cabf1b48ff0714e0a4f69fef1a8f8c02e2
font_01_sfnt_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 10472 bytes
SHA-256: d74c4c36a24b668e3c3df9b15569ffcb37c3e4a3da739525b443b01554f649dd