Malicious PDF — malware analysis report

Static analysis result for SHA-256 0224b335bb37c4a4…

MALICIOUS

PDF

84.6 KB Created: 2021-03-06 23:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6ec3acea452d5ede3e15a1affe18025a SHA-1: d9ae3d60f31f5f8c85f7a210545dd722d8500533 SHA-256: 0224b335bb37c4a44576ca935b85462ed32b989096939f88c2725ce91255e7a6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the links, suggesting a large number of redirects or lures. No scripts were extracted, but the PDF structure itself is weaponized to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://jottigo.ru/strik?utm_term=is+blink+charging+worth+it PDF link annotation
    • http://govnosiakxws.online/535138633732d2gg.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/gdibjaQ/big_baby_tape_errday_ntrcn.pdfIn PDF document text
    • http://women-ita.space/libros_de_control_interno_gratisbji6y.pdfIn PDF document text
    • http://construt.site/984905750288920l.pdfIn PDF document text
    • http://electorat.org/how_to_train_for_football_by_yourself75kjr.pdfIn PDF document text
    • http://myluckywin.site/28542500085z0ua9.pdfIn PDF document text
    • http://rezonansmusic.com/755237217764lhzw.pdfIn PDF document text
    • http://topmassage.net/bless_online_freehfide.pdfIn PDF document text
    • http://mysteps.online/command_prompt_codes_windows_10kefhe.pdfIn PDF document text
    • http://swast-group.website/powozinaneyit2m.pdfIn PDF document text
    • http://cadenalia.com/mubitaxasuxebale8vjo0.pdfIn PDF document text
    • https://cdn.sqhk.co/gitesafuwu/WidMtjf/pugak.pdfIn PDF document text
    • https://sakixori.weebly.com/uploads/1/3/3/9/133997256/mejevakise.pdfIn PDF document text
    • https://cdn.sqhk.co/sowumavag/h2ciegh/house_rules_paint_colours_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/jjgdhj6/tiptop_video_sharing_apps_downloading.pdfIn PDF document text
    • https://nolelagisumo.weebly.com/uploads/1/3/4/1/134132353/ruwasem-pijelogato.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/7bbd3919-3e36-418d-b126-de86d6ae7bb1/26616757320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab7e0a3-5b72-47d4-b1b7-aa3c71492966/fuluteb.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/svr_secret_video_recorder_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3981384-b3da-435b-abed-ff2b21a6b15f/zesejizajuvop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a77f53-cac9-4516-9bb7-76a46ed6f37b/estudios_biblicos_adventistas_la_fe_de_jesus.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/how_many_pages_are_in_the_maze_runner_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ebe54f-5c04-4478-bf30-3fe236c3657a/dazis.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/comment_fusionner_des.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_off0001030b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030B 5296 bytes
SHA-256: c855eaed38ee24890caaebf6c215ad387a5ddc04776faeccfaf8b57288c79fef
font_01_sfnt_off00011512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11512 2532 bytes
SHA-256: 394c240c8e5f3aadab1a709b55e5cbcc1b47e189138539bd4f0501eb3f16b16f
font_02_sfnt_off00012026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12026 10448 bytes
SHA-256: 2344e4a32b641a3480856f75d2efb209a8c5fe318c17a4d9f60d6175d9ef4885