Malicious PDF — malware analysis report

Static analysis result for SHA-256 036ac4696dcdac39…

MALICIOUS

PDF

87.2 KB Created: 2020-12-24 06:36:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c23e4bd6652c867e54c48190d03bda2 SHA-1: dc671ea376056a0ef1affb6a86d75a93fd9aa8e8 SHA-256: 036ac4696dcdac39ee936178c1a77a5f28be227d065d8e8c191c484e1a88c9b3
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/123?utm_term=louisiana+medical+board+license'. This URL is likely used to host phishing content or distribute further malware. The ML classifier also flagged the PDF with high confidence, supporting its malicious nature. No scripts were extracted, but the presence of a malicious link is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=louisiana+medical+board+license
    • https://cdn-cms.f-static.net/uploads/4422392/normal_5fac316fa0420.pdf
    • https://cdn-cms.f-static.net/uploads/4479715/normal_5fb584c176bfc.pdf
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5fd6126b46d67.pdf
    • https://cdn-cms.f-static.net/uploads/4371807/normal_5fdc058c69de4.pdf
    • https://cdn-cms.f-static.net/uploads/4450630/normal_5fd257e1f0919.pdf
    • https://cdn.sqhk.co/bivadudit/uggBghV/dove_channel_app.pdf
    • https://cdn.sqhk.co/lewivapawo/bqggpng/44553899149.pdf
    • https://cdn-cms.f-static.net/uploads/4394079/normal_5fbeddf671756.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/donarepemi/sad_breakup_video_status.pdf
    • https://s3.amazonaws.com/toguvaju/pobejagogizovobel.pdf
    • https://uploads.strikinglycdn.com/files/1336a0ec-1658-4a6c-b65f-935433487a28/doxosujopiwazimo.pdf
    • https://s3.amazonaws.com/vavale/97278404451.pdf
    • https://uploads.strikinglycdn.com/files/b55be570-573e-4dcc-b159-9aeaaa806fb4/59323454070.pdf
    • https://uploads.strikinglycdn.com/files/c62fd99e-d44b-4e5b-926e-e9b6d1f03771/68623436439.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_off00011867.bin
f77f0db0dab2e44348e4f4618de248124ead7514dcd8828a9829bb882c535237
pdf-font-stream PDF embedded font (sfnt) at offset 0x11867 5168 bytes
font_01_sfnt_off000129d8.bin
f8b7d131238e346edea23a1a5fcbec93a23f21c9c1da23c4f8484800c5870f72
pdf-font-stream PDF embedded font (sfnt) at offset 0x129D8 11168 bytes