Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1e9f2f6a65012e…

MALICIOUS

PDF

68.6 KB Created: 2020-12-10 01:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe2e5f5c7d2a18290da6920d056b5bae SHA-1: 5bfe2cd6ec448946525068445f95b9017e3e8cdf SHA-256: 9d1e9f2f6a65012ed070dc5865d5a14c854b1fd002f16c908075510bf22b2e7a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=darkness+rises+hack+tool'. The document body, though heavily obfuscated, contains text fragments suggesting it is presented as a 'hack tool'. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=darkness+rises+hack+tool
    • https://static.s123-cdn-static.com/uploads/4454182/normal_5fd07ff099017.pdf
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5fc5a6e9c1167.pdf
    • https://cdn-cms.f-static.net/uploads/4387581/normal_5f95e1a8b2fa3.pdf
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f996c0b5ded7.pdf
    • https://cdn-cms.f-static.net/uploads/4427091/normal_5fadac5e5b200.pdf
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5fb004da3f790.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tevomenil/64718237245.pdf
    • https://s3.amazonaws.com/debamijizozexo/49524543945.pdf
    • https://uploads.strikinglycdn.com/files/7fa63740-60b9-4bee-bfb7-61aa8ff41623/podumixar.pdf
    • https://uploads.strikinglycdn.com/files/35443b5f-ee02-49c5-8acb-c00ebd939c5a/childrens_language_acquisition_theories.pdf
    • https://uploads.strikinglycdn.com/files/d3c655f0-0930-46d6-adfb-083493d65833/nuparotubera.pdf
    • https://uploads.strikinglycdn.com/files/1ae0da42-e320-447a-a58a-883690175336/15468636478.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1f4.bin
20ec403ad12eafbd2d5b4678d5212092706ff77b12e08d54b57fbc17f7924985
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F4 4948 bytes
font_01_sfnt_off0000e2cb.bin
7a1f6e28f500b78acd0b966792a80ed62eda8fb530b6eceed6b3c0e0f0cd3dca
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CB 10324 bytes