Malicious PDF — malware analysis report

Static analysis result for SHA-256 786867ae2a64e82f…

MALICIOUS

PDF

81.9 KB Created: 2021-03-21 23:53:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 7186a1e1e107cd3011ef0f8d0dcac646 SHA-1: 2dd9e57b9640d656a8e3b3d95975787a7fcc15bd SHA-256: 786867ae2a64e82f970db6907bb1d753f1ec9cb14316434dca0fba289887d686
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the embedded URLs are the primary indicators of compromise, likely leading to a second-stage download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/strik?utm_term=dir-655+dlink+manual PDF link annotation
    • https://cdn.sqhk.co/naziwixolagu/XicdhiI/live_weather_map_world_satellite.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/8jadjj3/airport_flight_status_delhi.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/PjiwCxR/cash_app_refund_request_denied.pdfIn PDF document text
    • http://winclean-shop.space/workout_music_90s_rapx1f8a.pdfIn PDF document text
    • https://cdn.sqhk.co/bodorosuzuta/j4mOfjL/kizuvalon.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/jes4jjN/bukifesegenugefuj.pdfIn PDF document text
    • https://cdn.sqhk.co/xizaxulubezu/egitlhU/lucid_adventure_idle_rpg_best_team.pdfIn PDF document text
    • http://antonioit.space/gakerefakufuwupoda8hshh.pdfIn PDF document text
    • http://milesnires.xyz/nubutepevonax6p4i.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/2344106c-9a0e-4ce8-897e-acfb9f619a63/wafunuzusegi.pdfIn PDF document text
    • http://pibubirokur.rf.gd/addressing_modes_in_computer_organisation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db53e54-ac41-446e-b8ee-9c3e3359cf60/how_to_put_together_kong_dog_crate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7adf073-cf94-4e7e-82f2-a2bb482eca3d/98555202287.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/septic_shock_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f00ee41-a82f-4caf-91d2-7161aeb4829f/falcon_4.0_allied_force_free_download_full_version_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/93761147743.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/18727721250.pdfIn PDF document text
    • http://xaxurotowikofew.rf.gd/ambient_air_quality_monitoring.pdfIn PDF document text
    • http://mexowotevofo.rf.gd/lojatizakeripevipas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b2c62a-283d-4625-8f91-375585622b56/tricky_maths_puzzles_with_answers_for_class_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/demibeto.pdfIn PDF document text
    • http://rebikesumusosu.rf.gd/zazagujudobewuvarowolefaz.pdfIn PDF document text
    • http://guligovidafijew.rf.gd/python_learning_books_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CE 2960 bytes
SHA-256: ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b
font_01_sfnt_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 5164 bytes
SHA-256: e73d2fc477ab9125694ddfb5199a22430134039645dd917b989cfba01cbd00e8
font_02_sfnt_off000112dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DC 11784 bytes
SHA-256: a4446d78c2ad48824eed69d6ae8b04185363a8d6962e0bb80e72a694b00ac6f3

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