Malicious PDF — malware analysis report

Static analysis result for SHA-256 50456c02b345e05d…

MALICIOUS

PDF

95.9 KB Created: 2021-03-10 19:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f84c6856b9fcb5f8d0ea8b1d64e4c19b SHA-1: 9763edd03eedec69b6615948b989e6aec7538569 SHA-256: 50456c02b345e05d4321953790eeb632759607cd1fb38094d3ec95ca989459fd
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating suspicious links and a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a common phishing lure, likely leading to a second-stage download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/award?keyword=blockchain+teknolojisi+nedir+pdf PDF link annotation
    • http://item-mask.top/sudinitufuvanafememebazrup4k.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/ajigejb/nefezubo.pdfIn PDF document text
    • http://runmasten.online/93294990734k5o1t.pdfIn PDF document text
    • http://fesebenawasoz.iblogger.org/bidmas_differentiated_worksheet_tes.pdfIn PDF document text
    • http://xtreme-sport.ru/21472495437yff76.pdfIn PDF document text
    • https://cdn.sqhk.co/zinumazak/hVSijRk/4_pics_1_word_answers_picture_frames.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/ggdihjc/trivia_crack_cheats_ios.pdfIn PDF document text
    • http://ramedefinu.getenjoyment.net/rheem_tankless_hot_water_heater_reviews.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/puboziluturoxenadazesuub65n.pdfIn PDF document text
    • http://noxudisogukat.iblogger.org/arduino_ide_windows_xp_download.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/6f4925e3-e761-4499-a620-db6bd0ff4993/what_size_bolt_pattern_is_a_ford_ranger.pdfIn PDF document text
    • http://zalufebali.rf.gd/soraradajezegewuvokipopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d57f96-33d2-4baf-a65a-214ff7a2cb2d/jafuroxiwuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2380af2-7e41-4adf-8475-614675f501de/73443634962.pdfIn PDF document text
    • http://luvuzodemuxula.epizy.com/how_to_program_craftsman_garage_door_opener_with_universal_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b69c3960-d49a-4577-9c52-3cdf5f0df1d4/46492188053.pdfIn PDF document text
    • http://budokukikaririd.rf.gd/72311214197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f9023d-2d33-41cc-b0b6-1cdf14382989/samsung_scx-4623f_driver_windows_7_64-bit_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f08064-6c6e-4211-a487-22c98bac537f/zarexoti.pdfIn PDF document text
    • http://xenezipulugiji.atwebpages.com/wordly_wise_3000_book_5_lesson_2_test.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_off00013979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13979 5432 bytes
SHA-256: bf32ed7c9b21543e074e2c564ba7e6246bfd72bae76a93c40b708143115c8ec1
font_01_sfnt_off00014bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF2 11840 bytes
SHA-256: be6b4e05da64146d1e24bf2d00e592c44e5b117ea1b4b3727fd866c3862acfc1

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