Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ecab5ec31173ee…

MALICIOUS

PDF

66.3 KB Created: 2020-11-19 05:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a831b1321be593382888d98505e6ca72 SHA-1: 21aa96d388fa06e7279135830367d6a00603a3b7 SHA-256: 92ecab5ec31173ee446fd0d57e3706d3a738c6ab8d355d817b9df19fcabcc8f4
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://cctraff.ru/123?utm_term=what+is+a+corpus+delicti In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_5fb58f59204e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_5fb5b4615575a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403260/normal_5f92773e3ba4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457604/normal_5fb2d5af3c648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f99bc718bfd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f97898fca578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f99ec6c8e8c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446776/normal_5fa075b716693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_5f91d9efbbedc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zonivezada/application_of_computer_network.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/fragile_dreams_farewell_ruins_of_the_moon_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b165afb-81b1-498f-a537-4db70262dff7/36414378907.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_off0000c64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64F 5176 bytes
SHA-256: 85c26456d97525730e6afceb50e9a9c861cbe78adfebda6c5cd5d9c56312d80d
font_01_sfnt_off0000d7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EF 10820 bytes
SHA-256: 4d144f9ed4f99ba452b1b90aa138c4fec69dbcd0ce45c4f94dda0d79a702ca59