Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf6f844155df34a…

MALICIOUS

PDF

94.1 KB Created: 2021-03-24 23:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 69d4cd8aa21256c5beb747dd123b2f9d SHA-1: 5a33bc2af2b754e5574491dbbef6fcbe00a0a057 SHA-256: 8bf6f844155df34af5f632543ab777c68e5dac7f3f59658f8d6ea4530275ac70
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. It contains numerous embedded URLs, with one pointing to 'bologen.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded links indicate it's designed to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=pathfinder+character+sheets+2e PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412165/normal_5ffa1e72443dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484355/normal_6054c5042734a.pdfIn PDF document text
    • https://cdn.sqhk.co/tuforalogidu/bgciehj/23190650025.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/iizOEha/action_trucking_nisku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501229/normal_60570293ac222.pdfIn PDF document text
    • http://esclick.pro/419476693xdq80.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/how_to_adjust_poulan_pro_carburetor.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/dNhgghV/72334194278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419642/normal_603a85b5092ff.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/depodemunetidovarodexo6y0.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/NhbdhcQ/82484925418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380528/normal_6032022787c2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499635/normal_603a07598380d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_9ccc2f353ecd4a3ba1a5db28a5e5e64d.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_bebd76bf849d40cd909fa6027e27458d.pdf?index=trueIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_c734057a69df4ed1a6641fd953967779.pdf?index=trueIn PDF document text
    • http://bopewexe.onlinewebshop.net/36760071602.pdfIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_851c6a21b3b84e5b806ebaeca67f5104.pdf?index=trueIn PDF document text
    • https://7d33af4c-acfd-4996-9436-348e89828b5b.filesusr.com/ugd/289672_92cfe708969e4f4281022410399fceee.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_off0001304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1304F 5212 bytes
SHA-256: 9605b752de81937f09d527248fe5846fadae25491fc2a3cd4cf258ea8a2302b2
font_01_sfnt_off00014205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14205 11552 bytes
SHA-256: dbac033276ce2645a8327acf1fc1f5a3968abd70edea2c6545a167a5e984d631

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