Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0260e3ec7a2611…

MALICIOUS

PDF

67.8 KB Created: 2020-11-23 22:11:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b2fd3dfb307db332b7d683dd3afd2f24 SHA-1: 4446b6ceb1c9301c951227c5aebd977c1938ccc2 SHA-256: 0f0260e3ec7a261152d9995ff769ea50f0378afcae7c135b7aaa88740f4f8e86
214 Risk Score

Malware Insights

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

The PDF contains a link farm and redirects to a known malicious URL, indicating a phishing or scam attempt. The embedded content, though obfuscated, suggests a lure related to 'War thunder battle rating'. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/strik?utm_term=war+thunder+battle+rating In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5fb7dd8909fc6.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/ea448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_5f9784a86d28b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476148/normal_5fb8b193f1fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450353/normal_5fa73cd2c23d1.pdfIn PDF document text
    • https://julapaxukej.weebly.com/uploads/1/3/4/4/134492969/lopin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f8b689a8ca5d.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/vibule.pdfIn PDF document text
    • https://rajofike.weebly.com/uploads/1/3/4/5/134500595/bamirukonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5f914b6c83c57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_5fa0990bdb1b6.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/e4af77fd-cc22-4e75-93f2-1ef2d1c843b9/xarawejejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17df218e-58d8-4355-9df6-ba50ecc1a570/vusd_calendar_20-21.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_off0000cbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF6 5060 bytes
SHA-256: dc2b48f182f77b4dcd7a9a304455b83ba12415fe88df992d434094e6b37f4b6c
font_01_sfnt_off0000dd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD34 11088 bytes
SHA-256: 6076b1bb578e64f174b59a4eb68a8c6190aeeb96565c8d2ca60e8e8df5298863

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