Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e06dcc933e0dd99…

MALICIOUS

PDF

89.0 KB Created: 2021-05-17 22:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4495dd0f17ac073dea50457580e52166 SHA-1: b20f0639017a61ead6eb3a07b45b379a98f04a7d SHA-256: 3e06dcc933e0dd99152095854b7bff17df83e2951d2b4e041c6aa7aff6b002db
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'fokemale.ru' and containing a search term related to a product issue. This suggests a phishing attempt to direct users to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/strik?utm_term=dyson+dc25+brush+stopped+spinning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369920/normal_60537282d853a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495838/normal_6007f0df007d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_602798ef1ccce.pdfIn PDF document text
    • http://wokizunapajunez.iblogger.org/resivuzukada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_605a0327686d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445558/normal_5fe7aa83c315e.pdfIn PDF document text
    • http://zefeziwiluj.22web.org/art_of_the_deal_free_audiobook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498992/normal_5ff91ee086abd.pdfIn PDF document text
    • http://dopenukivo.22web.org/automated_software_testing_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460950/normal_605fa7fe7567c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479916/normal_604cfd624c7f0.pdfIn PDF document text
    • http://bejuzoz.iblogger.org/video_star_apk_free.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/28eba618-01e1-4364-8a7c-1538f4c98d03/bubolusadosirefepobene.pdfIn PDF document text
    • http://lunufisisosixi.rf.gd/33091819678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf00ddd-c414-4cd5-8710-45451225c18c/dubukegukex.pdfIn PDF document text
    • http://befokube.rf.gd/saxon_math_8_7_download.pdfIn PDF document text
    • http://vipowiso.epizy.com/italic_handwriting_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/woodworking_basics_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/limovukifuliperal.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/grammarly_extension_for_firefox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dadc7c6-4191-4bd3-a753-9db6321c3125/madajedamale.pdfIn PDF document text
    • http://bamenawasez.epizy.com/50517074267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce6cd5b-6234-413a-9c44-d95337d8252d/hp_ultraslim_dock_2013_docking_station_d9y32aa_compatibility.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_off000117de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DE 5588 bytes
SHA-256: 9ffb792ee62797f5d20386dca1e70a36070d7efd953accadcb39785e5cf852b4
font_01_sfnt_off00012ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE9 12516 bytes
SHA-256: 673bfa0fdd6e7c04c5745356b408539f63156c19139cc0c401688124132b6334

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