Malicious PDF — malware analysis report

Static analysis result for SHA-256 4295c708efeca5b5…

MALICIOUS

PDF

103.5 KB Created: 2021-03-13 22:22:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: aa03ed8caa235673a9e482dfd7c4511e SHA-1: a01d30fe9a435ca5e8b5e3b6f8c7d032fda677cc SHA-256: 4295c708efeca5b53df55eb967a06b9edf2bf631c9719484895be55b9642070c
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains an embedded URI pointing to 'dugedepap.ru', which likely leads to a phishing site or a download of further malicious content. The PDF's structure and embedded links suggest it is part of a link farm designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/award?keyword=breast+abscess+management+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486763/normal_5ff27402a2198.pdfIn PDF document text
    • https://vekatofe.weebly.com/uploads/1/3/0/7/130775682/begun.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/kiran_publication_bank_clerk_books_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_6040d8279ac90.pdfIn PDF document text
    • https://mejapibidar.weebly.com/uploads/1/3/4/3/134315264/8533896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527357/normal_600ca85f3b905.pdfIn PDF document text
    • https://dudisavaw.weebly.com/uploads/1/3/1/3/131380109/7369077.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fe40ed4d92cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407552/normal_5fe4ab9ec07c4.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/liwonupexe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_5fe147ffd1f46.pdfIn PDF document text
    • https://wetexojozow.weebly.com/uploads/1/3/0/7/130740218/cfb1abc92ce960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_6045ff1480616.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wojibikifi.myartsonline.com/83627674082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f412da9-2a2f-4b2d-81ee-1c106763f678/6933215957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/944fccbd-b182-45be-941f-9e0abe84c990/97381127286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352073d6-134a-404f-b910-803262871fc3/rozonuvopigexudilisoro.pdfIn PDF document text
    • http://vizomonuzujo.onlinewebshop.net/how_to_reset_timex_expedition_watch_after_battery_replacement.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/basketball_drills_for_middle_school_pe.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/mosuxix.pdfIn PDF document text
    • http://bajekixizosi.myartsonline.com/nixon_sentry_leather_black__camo_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c799ee8e-0af1-4ce6-b729-7445059c2610/pipogoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca1b995d-c030-49e0-a90f-0249cd6ff565/what_is_imagery_in_sports_psychology.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/xanapaboroviwonik.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_off00015871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15871 5632 bytes
SHA-256: e191dfe1257ed3152f0e3cbbdefa582d589f65da746d5174d9e98ba5159899d0
font_01_sfnt_off00016b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B7E 10976 bytes
SHA-256: 28367323c5405003d1e08eaf2a1ac99c4b7d25133621b24a76202ced7de7f853

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