Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65066f60a1db869…

MALICIOUS

PDF

85.1 KB Created: 2021-03-26 12:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6dfe2860b2014ee1366c043eaec3f90d SHA-1: 625e7b1d6f1f57ae0a7fd43f30637a603f551676 SHA-256: c65066f60a1db869f351b704274e9e8c923309b174880301fed3b24dbae41269
186 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body's mention of 'Canada study visa form pdf' serves as a lure to encourage clicks on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/123?utm_term=canada+study+visa+form+pdf PDF link annotation
    • https://nezuzubes.weebly.com/uploads/1/3/5/3/135327702/dubikokoguxub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427267/normal_601d5b5064d39.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/sjdidje/40906168214.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/public_finance_management_act_zimbabwe.pdfIn PDF document text
    • https://welaruno.weebly.com/uploads/1/3/5/3/135325412/2607403.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/ibSenig/battle_ground_craft_survival_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_601ef3dc36ceb.pdfIn PDF document text
    • https://kovekigesig.weebly.com/uploads/1/3/1/1/131164481/3848b5e09434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449777/normal_602786d0036b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_603cad3d966fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_600de860a5122.pdfIn PDF document text
    • https://patobusogeziwe.weebly.com/uploads/1/3/4/0/134096506/fetoroz-sufaxu.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/nakamudevexitetite.pdfIn PDF document text
    • https://cdn.sqhk.co/mozopojugode/RKx6YYR/sad_ringtone_2019.pdfIn PDF document text
    • http://begimewabifax.getenjoyment.net/medical_english_terminology.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jadivepijuga.myartsonline.com/86091639047.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_e8aaae1af49447668aac50c40fac8800.pdf?index=trueIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_bf1a61fe8ba141bd8923fe9b178aa727.pdf?index=trueIn PDF document text
    • https://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_d25dfe5cbd6c4d1a9a9caf1ab3761fa4.pdf?index=trueIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_eeb5b336a7be419aa688e6e3a1b340f6.pdf?index=trueIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_b4d97a940ed440e88ae1003c5879d9cf.pdf?index=trueIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_a6f84fabfdd647768a2f1ef543b92448.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_4f32e394908340e7a83682bfe37bd48f.pdf?index=trueIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_be957da4e6cf47f6be91ae2c203e1590.pdf?index=trueIn 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_off00010e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E93 5224 bytes
SHA-256: 6185e693dc3f7bac0bd5a92099320599bf12cd43ab4cdc0400d02f629b640b72
font_01_sfnt_off00012050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12050 11912 bytes
SHA-256: 09ca0909bc716d8f4bbc1909053c7e815daf2621be057b5d1f2b7fd3598c4a6d