Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61ae6c38edd5889…

MALICIOUS

PDF

80.6 KB Created: 2021-04-07 11:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 54b7f2b15b41821dd00ec5b0a58bf0de SHA-1: e2b7e5422732a841964c969f46a7e840dd48d644 SHA-256: c61ae6c38edd5889fcdea492630cbe874a341a98346fc2343703be27763b4b71
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic score indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=space+propulsion+analysis+and+design+ronald+humble+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490266/normal_5fd1b7fdb2697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_6022c3611f867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_600b6133d816d.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/catalogo_hinode_2018_ciclo_3.pdfIn PDF document text
    • http://serovakarara.mygamesonline.org/jokafov.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/44734978493.pdfIn PDF document text
    • http://xejitifuwoligaf.mypressonline.com/44839804798.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/batman_pc_game_highly_compressed.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/sewisuroxodum.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/unstable_angina_guidelines_2016.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/woolworths_application_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410211/normal_5fdbfa6331770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_605018b42e121.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/the_secret_garden_full_movie_1949.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/7aec0015-b54a-4199-a726-dbe152636d05/90_gramos_a_ml_mantequilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c082dce-dad6-457e-bbc2-5449867b185e/xowazagarulutarifow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c666181d-bdb7-4e6f-8297-6c20f671047a/fanuromupabisakanum.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/146448358.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/nios_dled_assignment_cover_page_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c63b4a0d-aa22-4ca6-9bed-6540ba1713a6/kitchen_pro_bread_machine_manual.pdfIn PDF document text
    • http://solarujarinobo.myartsonline.com/antimicrobial_activity_of_garlic.pdfIn PDF document text
    • http://wovodijulenape.onlinewebshop.net/bowling_for_columbine_analysis.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 5912 bytes
SHA-256: f5c418cb1a5eb0dc4c5796cff374decc418a9fe1814e7a81b17808a55ac892c8
font_01_sfnt_off0001106a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106A 10584 bytes
SHA-256: ee82a6ecdc271260a25ef7985b1419b7c24287a060a6c829f85178b2793d50cc