Malicious PDF — malware analysis report

Static analysis result for SHA-256 15dca3579fd23afb…

MALICIOUS

PDF

75.2 KB Created: 2020-12-20 00:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0b4130c8137cf04afb7b3e6dab9fa156 SHA-1: d242785e21cccaf6de940d0f6f44a898e4ed83e1 SHA-256: 15dca3579fd23afb1c6d43c5952aadfef6962c65d12225f13e7b6fa4a6b12714
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://traffset.ru/123?utm_term=south+charleston+high+school` is the primary indicator of a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=south+charleston+high+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417537/normal_5fa150269ab41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5f92ca2fede7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481289/normal_5fb6b231ae871.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/2c5ae332-9b37-4590-8430-1e9e774717f5/zoripobujeloke.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/47597743709.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/barcelona_weather_report_14_days.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257c4be8-78a4-4e6d-854a-2cc8c584b18e/ode_to_joy_guitar_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7947bcb-5574-47c8-ac0b-7e99e69abc64/cypress_hill_discography_torrent.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/libujagopozezib.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/78166755552.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/adobe_flash_player_12._0_or_newer.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_off0000e8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F6 5164 bytes
SHA-256: b4d04f27eaebbddf422084217ddd027c3b7f975fbac2938873821a7bc2b53d15
font_01_sfnt_off0000fa7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 11080 bytes
SHA-256: 202dfacac61c04d48ea76d9b600f590c17671c364149716178fa8a49a962ef78