Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d83732ad4c6274f…

MALICIOUS

PDF

68.5 KB Created: 2020-11-26 05:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 25c9e34bbde5ae3b76e90592500bd86b SHA-1: 9f433ecb1f333d816b38cf78e5dfb00a60d02141 SHA-256: 9d83732ad4c6274f308a2949b4c6a8545c910cb57768fb9e8bb68ef38871a3c6
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, traffking.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a "king rat book pdf". No scripts were extracted, but the presence of external URIs and the overall malicious verdict indicate a likely attempt to redirect the user to a malicious site.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/strik?utm_term=king+rat+book+pdf PDF link annotation
    • https://fofafobef.weebly.com/uploads/1/3/4/3/134349457/2371169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421201/normal_5fbc1e2455b34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_5f8ddc032321f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419629/normal_5f99497f8bb22.pdfIn PDF document text
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/ab8a878cd9764d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f91afe2534e1.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/xekena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_5fab39298a229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_5f982a82a5288.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/40a247bfa91b.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/3f3f4a35-57e8-4785-a348-0aabaabb8732/14503465109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0899934e-c9db-4c60-bba6-c785d8b00ff1/verdade_e_mentira_no_sentido_extra_moral.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/chess_merit_badge_worksheet_answers.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_off0000cfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB1 5172 bytes
SHA-256: 0c29180b32450dc4e7b311bd22eb3a8bda1c813061f7a393b8f2f9bb97548010
font_01_sfnt_off0000e15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15C 10840 bytes
SHA-256: b5d81a50764102cc61bab6ef714ff300a127381fcc945416832d98bd626bfc7d