Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b7261cff2745dc…

MALICIOUS

PDF

69.7 KB Created: 2020-12-21 11:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c3d84a0a21a047f655e203e57d13d566 SHA-1: 7ce05f9564e021c343fe293368028dcf301b2bea SHA-256: 88b7261cff2745dc13ee387596b05a2f3365252f9961dac0d0aad938db66420f
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/strik?utm_term=planescape+torment+review+switch'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', indicating a phishing or trojanized document. The document body, though heavily obfuscated, contains strings related to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=planescape+torment+review+switch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5fb772c954348.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/5409225a-9f0a-45a0-a55b-27f91f8e93a1/phantom_forces_price_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/30120370475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0619deb-0bc8-495d-8928-34c08119b938/soxufubimunogewopodox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1888364-20e1-4fa1-931b-331b6c532970/buxaginadagi.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/bupedamogufatub.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/ttgo_t-display_esp32.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7dc3dfdd95b60d4c91c/t/5fc29993f8cdb769c6382e63/1606588819992/71016502013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7105b3d7-b96c-47cb-9e1b-1db96da455cf/69001611023.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/8861136384.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/temeluj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c34e9ea-ec4e-4f5c-b4f9-bd822d0195f2/jivajik.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_off0000d4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C2 5328 bytes
SHA-256: a5efe0509dea80102af3506272c62948c70b8d9e31312d49c7c2e58e24677a65
font_01_sfnt_off0000e6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 10276 bytes
SHA-256: df222fced8e0816de0cd14dce6593821a3dcd089cd3781a41ed0dae669c6d791

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