Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b21dae4e659144…

MALICIOUS

PDF

79.9 KB Created: 2021-03-15 04:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6945b8f44ab47c7bf175653667507cea SHA-1: 9f5087285b8b653e2958076721965b4ee085db2f SHA-256: 06b21dae4e6591441b71348465685567cd3ae68800a64eebc049c92fee07f91b
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://lozipotod.ru/strik?utm_term=calculus+derivative+problems+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421983/normal_6012097cc5230.pdfIn PDF document text
    • http://conicppjry.bid/how_to_set_up_sodastream_fizzi_one_touch9ac76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501791/normal_602013eb72524.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/platicas_pre_bautismales_en_domingo_en_guadalajara.pdfIn PDF document text
    • http://gufutaca1.xyz/binuwokinokiguzapawn8les.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369772/normal_5ffe737d02015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377697/normal_5fc65a2f077f4.pdfIn PDF document text
    • http://erse.xyz/best_warhammer_end_times_bookssu7ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_604ac7b049580.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/7973828.pdfIn PDF document text
    • https://gabukoxikala.weebly.com/uploads/1/3/3/9/133997771/luvuv_jixaverudulodi_parazupod_kamokeratoxawu.pdfIn PDF document text
    • https://jowajasodosetu.weebly.com/uploads/1/3/4/3/134308851/690818fd7a58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477649/normal_5fcb34176ee7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_601dca71a5f23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_60316d444a436.pdfIn PDF document text
    • http://mmuuue.space/wobuwqtkjk.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/zewivep-ripitip-vegudifapabaket.pdfIn PDF document text
    • http://springwin.space/truck_wallpapers_for_iphonerdlrs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_601cd8743be13.pdfIn PDF document text
    • https://juziwujaxizeze.weebly.com/uploads/1/3/4/6/134685910/3081506.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://livirava.atwebpages.com/tekuwon.pdfIn PDF document text
    • http://gitodake.myartsonline.com/watch_pride_and_prejudice_and_zombies_online_free_dailymotion.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/zimevodosumugepitebomifet.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/applied_linear_statistical_models_5th_edition_instructor_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/danganronpa_v3_class_trial_3_guide.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/how_to_redirect_subdomain_to_port.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_off0000ed34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED34 5468 bytes
SHA-256: f0165e39cb8a5708b27742fd273f2596c71b6cc0a1ad79d0738bccbd321c63b4
font_01_sfnt_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 10576 bytes
SHA-256: 43d523778dcdd1fe63faaae24aaa8f31a96fb97c5c993c50d7e0cf7a68cf7a8b
font_02_sfnt_off000123a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378