Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5fd7572dfa3c3a…

MALICIOUS

PDF

72.7 KB Created: 2020-12-23 17:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5eb78ceec48b128288ddf09f6f2d1d28 SHA-1: 93b0e925a4225c489c5f3d67681e64ef019c06e8 SHA-256: fe5fd7572dfa3c3a830c14143c92b17b1aa3bd594416a27fc548da3328067b20
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by heuristics as an external URI. ClamAV detection and ML classification strongly indicate maliciousness, specifically flagging it as a phishing trojan. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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://trafffi.ru/aws?utm_term=clinical+practice+guidelines+diabetes+2019 PDF link annotation
    • https://cdn.sqhk.co/dowufagit/jf9njj2/shoot_em_up_pc_games_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490528/normal_5fd3179f10247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_5fdbcc626cd35.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwejujorod/Rghihif/zatinuvofibomuwagewapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495837/normal_5fb39bdde193a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_5fd830a7b0ca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_5fa4481caeade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482426/normal_5fd6d1aa88276.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/10b7f012-6af7-4177-aacd-7bebb854aa25/wixuxudowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d4a6e0-1cde-4545-b4a3-0a82ba45e227/nebovoteboporem.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/91886054907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee54ccb0-75de-47a4-a3b3-ce2d373fde3f/blue_ribbon_coalition_board_of_directors.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/informacion_de_las_chinampas_aztecas.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_off0000de01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE01 5768 bytes
SHA-256: 30334aa92005b50ed3943b57ec605c53c5a6480d0d15f5ab97cf0b337a045e95
font_01_sfnt_off0000f1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 10636 bytes
SHA-256: c5cd401b1d4a85fc6491af8264c47b9f0730336bf1edece7b98b3883c37f058e