Malicious PDF — malware analysis report

Static analysis result for SHA-256 240cfc94739568f5…

MALICIOUS

PDF

60.9 KB Created: 2021-01-25 20:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 45065890ce1255c08a6604f4d5ffceca SHA-1: 2b9f66c3ede05ae03ad11f8c1fe3cc4a2602bf23 SHA-256: 240cfc94739568f53199958b268f4b93c5d53d55ef21300118e23f8102be3a6a
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to external websites, masquerading as application downloads. The primary malicious link, 'https://cctraff.ru/wb?keyword=digital%20wellbeing%20apk%20android%207', is flagged as a known malicious redirector. This suggests the document is part of a phishing campaign aiming to trick users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wb?keyword=digital%20wellbeing%20apk%20android%207 In PDF document text
    • https://cdn.sqhk.co/zesonixiv/inhdajW/safeon_personal_safety_app_emergency_alerts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418385/normal_5fe18d098b285.pdfIn PDF document text
    • http://znakomstva69.space/50162329240gltz2.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/hh0Qidu/free_wifi_passwords_hotspots_by_instabridge_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/bBchehf/dunia_games_ff_top_up.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494674/normal_5ff90b6333a39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5fe9cd4a55558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497075/normal_5fe7d339ef041.pdfIn PDF document text
    • http://bonuwefuganagus.22web.org/dimobogofibem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415543/normal_5fde02bda73fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gokozir.rf.gd/vpn_chrome_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/backpacking_checklist_3_day.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_off0000b4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B1 5324 bytes
SHA-256: 0ee24d6af016b95d325ae0984a4b89735defa0683e3808c3fae584d1a3da8ecc
font_01_sfnt_off0000c6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F7 9368 bytes
SHA-256: ff07624a9b72012f00aa1a93a5313a0be7a580b9c66c9191cb4235bf8391b494