Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ca21ceb277e5eb…

MALICIOUS

PDF

78.4 KB Created: 2021-06-05 18:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 00d64376c91eaf6b9d7c64e965448b05 SHA-1: a9ef320208507b15f3b110c70958149839867044 SHA-256: b5ca21ceb277e5eb8536a08d4e611b83d0d8d09e1b6ab940c95df6c1e2ac9c68
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though partially corrupted, suggests a lure related to obtaining a driver's license. The embedded URL `https://catamma.ru/wb?keyword=how%20to%20get%20a%20driver's%20licence%20in%20maryland` is the primary indicator of malicious intent, likely leading to a phishing or scam page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/wb?keyword=how%20to%20get%20a%20driver PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479916/normal_6031949d9ee8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392462/normal_600406045074f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386366/normal_5fdf060841ab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_604b49c2b258b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_60551df09c6b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_5fd64bcbb37d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426261/normal_6065589974b3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475987/normal_6063e9e4bd1c2.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/5f7b90a6-26c2-48c5-a058-5e6093355718/can_i_renew_my_ga_id_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223302fe-4784-49a2-a1c1-e7c0bf888d01/maytag_bravos_xl_heating_element_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e04e813-f540-4ae9-9dc3-0aa98d7a7f81/22636384868.pdfIn PDF document text
    • http://tezalef.pbworks.com/f/computer_organization_and_architecture_online_course.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/f/86133639302.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/sebinewejasodimo.pdfIn PDF document text
    • http://sikawejedi.pbworks.com/w/file/fetch/144627438/47778713543.pdfIn PDF document text
    • http://labidan.pbworks.com/f/gowepazajinu.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/f/can_you_get_more_watch_faces_for_apple_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32303c41-8502-4dd6-acbc-786886c5ffd4/cuidados_de_enfermeria_para_una_trombosis_venosa_profunda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f8e9cf1-35e6-41fc-9ea0-6ac47d7f8761/how_to_name_a_story_book.pdfIn PDF document text
    • http://siwuromo.pbworks.com/w/file/fetch/144425316/diferencias_y_semejanzas_entre_los_gneros_literarios.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53E 5508 bytes
SHA-256: 302cd6682c5245ddb15856e25d6461979c1d264079cad04261705ff03cb21cef
font_01_sfnt_off0001080e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080E 10952 bytes
SHA-256: 9ffb828a6a3b1606881d1d6515d7ec6ba9b77313c2b56fe34890109979ed9720

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