Malicious PDF — malware analysis report

Static analysis result for SHA-256 399a785d8fcf593f…

MALICIOUS

PDF

69.7 KB Created: 2020-11-17 21:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01cdf35edf593f6e47da531924f17fba SHA-1: 756cb0401cbf0ee8f9f991cd6a4a3636e1d7eb68 SHA-256: 399a785d8fcf593fac1c00df56e52757fffd436939d6607e85550a62d554be10
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a URL disguised as content related to 'Bungou stray dogs season 3 characters'. This URL, 'https://trafffe.ru/123?utm_term=bungou+stray+dogs+season+3+characters', is likely used to redirect the user to a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, specifically phishing and trojan activity.

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://trafffe.ru/123?utm_term=bungou+stray+dogs+season+3+characters
    • https://joxezikawatunex.weebly.com/uploads/1/3/4/6/134699300/fuzulogawedumipusamo.pdf
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5f9bddf496c28.pdf
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f95ec7f9adae.pdf
    • https://jidamusalaf.weebly.com/uploads/1/3/4/3/134378250/352fb6df3.pdf
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/7690857.pdf
    • https://foravozivosuwu.weebly.com/uploads/1/3/4/0/134042788/sixulifaxawadi_jusenemepoxodu.pdf
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5f9a7bad51fd3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rodigapigeta/tactical_assassin_unblocked.pdf
    • https://uploads.strikinglycdn.com/files/88afe930-5ecc-4b58-b6e9-9f220f7aaf0f/numero_de_stanton_en_transferencia_d.pdf
    • https://s3.amazonaws.com/vufupu/codeigniter_user_guide_3.pdf
    • https://uploads.strikinglycdn.com/files/8c093585-e6c7-49fa-80ad-5c27a0114142/spider_man_far_from_home_full_movie_online_free_reddit.pdf
    • https://uploads.strikinglycdn.com/files/79659ca3-9d60-4f77-9b30-73aeb7ce92a3/hltb_doki_doki_literature_club.pdf
    • https://uploads.strikinglycdn.com/files/5e3a633b-a384-4c01-9d59-81b93e1f7f61/las_partes_del_cuerpo.pdf
    • https://s3.amazonaws.com/zafirawit/71970670486.pdf
    • https://uploads.strikinglycdn.com/files/ec7eec00-4f50-4e53-9fb6-cb9b5230fe4e/bepiduxixu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d39f.bin
5be7b13e8076ab67b1724ce78751a5434774c3c3e579c6afb2a29231c6c1e5bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xD39F 5484 bytes
font_01_sfnt_off0000e64a.bin
4ec66c3c59a4deb21c8afbbf4dc4e0d256c4c92c410c8edefbaada7fc9682a37
pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 10404 bytes