Malicious PDF — malware analysis report

Static analysis result for SHA-256 60823ae4a18abd3c…

MALICIOUS

PDF

65.9 KB Created: 2020-11-25 17:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1c87cc361e4c66fd6540227c90ebe9f7 SHA-1: 5cd0a2a5dea3085c66da01cbb1193696b252e05c SHA-256: 60823ae4a18abd3c1e426d06f99dae978f8841b14c70b53e6f87bd280c07285f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely as part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=black+wall+street+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465908/normal_5fa303b139f28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467285/normal_5fa33cbe64b23.pdfIn PDF document text
    • https://wazemuguv.weebly.com/uploads/1/3/4/4/134489137/396151.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/7dd4544c-7e0f-4d7d-a6fb-4a61ecf9b50e/xabagajagop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7075c591-810c-4386-b523-2c067f3c43be/64236084742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680ce34a-c3d0-46e5-92a2-c0247220dd35/93474960582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f007c2-a940-48d5-8417-94734a190376/moxumegoranizizixap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e5f86f-631b-4913-8f2c-4d9490806a89/vafimumijizakinuxagut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374936ad-a918-4370-bbbc-77fc44b74e7e/2018_911_gt3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d557f0d0-a8f7-4ab3-afb8-433a1136d1de/caltrans_exam_study_guide.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_off0000c449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC449 5492 bytes
SHA-256: 8f0ce32465cf049766e69149c2d0c4c933f3d56c35f076414f86fd48f6fe2653
font_01_sfnt_off0000d717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD717 10692 bytes
SHA-256: 0bde7d0f00be1168212e47f86f9a4df9aea8592d61d6b04f6609e8e4d28f6352