Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b4f7d0a67acc38…

MALICIOUS

PDF

75.5 KB Created: 2021-01-19 01:56:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: d1357b63d3f2f004aa8a9accf7b76651 SHA-1: 08ad14e4361eced1af6e50a663fab13b1a2937da SHA-256: 07b4f7d0a67acc3857231ba50daa0fa92fb44523131c1399387f7aa4f19c9346
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/shook?utm_term=vlc+video+player+download+for+laptop In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_5fb53cf48d887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f95043439db7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5fb5e665e02ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5feb35f4dc41e.pdfIn PDF document text
    • https://site-1172648.mozfiles.com/files/1172648/instant_drag_racing_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5fc13e7678467.pdfIn PDF document text
    • https://site-1166749.mozfiles.com/files/1166749/fatidonosebo.pdfIn PDF document text
    • https://site-1208094.mozfiles.com/files/1208094/pulikowelixapubusuwiwe.pdfIn PDF document text
    • https://site-1245158.mozfiles.com/files/1245158/beatbox_game_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470211/normal_5faf79952dd21.pdfIn PDF document text
    • https://site-1241159.mozfiles.com/files/1241159/cpe_reading_test_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498994/normal_5ff1efc66dd85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5f9b3a89dae52.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416154/normal_5fc744fa4b100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374838/normal_5f8b505c1ed0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459623/normal_60025b51e204c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427795/normal_5ffc794a763d8.pdfIn PDF document text
    • https://site-1178807.mozfiles.com/files/1178807/crazy_dino_park_level_105.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ea9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 5192 bytes
SHA-256: d4e6cc249e6c6dc93744aa3f7fb6f5c9940cb75a2a785b8fb415ac71775d33d1
font_01_sfnt_off0000fc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7C 10732 bytes
SHA-256: d33a99a57a8aa5a8d4420f9da2e0de87be445d430cf4c9118c8083af0e26f9cd

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