Malicious PDF — malware analysis report

Static analysis result for SHA-256 05cc760cfed2a2fc…

MALICIOUS

PDF

94.6 KB Created: 2021-03-17 09:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5e39facf6123c955d2f4043c1d350db3 SHA-1: 10292fe988fa315ae9ebbd239765e15919efb82e SHA-256: 05cc760cfed2a2fc0a62e0d5c1fce00b3ccc8dc5383f03cdb2820b9108b5dbb3
96 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary focus on directing the user to 'vilenefex.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous URLs and the nature of the heuristics suggest the document is designed to exploit users by leading them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=commentarii+de+bello+gallico+pdf+english PDF link annotation
    • https://cdn.sqhk.co/jinubodilev/ahijYki/supertux_game_free_download_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/0ghjbIC/farkle_dice_game_rules_printable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_6040b9e4031e1.pdfIn PDF document text
    • https://cdn.sqhk.co/jetuzama/ijgnMhd/48657514960.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/glSidgc/80476277120.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/ZT1dKvz/mechanism_definition_engineering.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_6015819d1e908.pdfIn PDF document text
    • http://arbitestpark.xyz/fevosudonaneragajifosenuraa2c.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/c6DUku4/guwolokenejepakibiwaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_5fd2aee05ffe2.pdfIn PDF document text
    • http://rubyshup.space/vesibunibolalisavupzcqv.pdfIn PDF document text
    • http://bitcoins-profits.com/bachelor_of_business_information_technology_kca_universityyx50a.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/2gduI2u/canciones_populares_para_guitarra.pdfIn PDF document text
    • https://cdn.sqhk.co/vilosezuj/f9gfgcj/brain_balance_center_las_vegas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410962/normal_600ddcc1c143a.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/c6eab4fe-244c-41a3-b78e-dc0280f84911/setivifimar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c47594ed-1822-471d-b6ac-ff61a60fba31/39115832510.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_off00012e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E09 5612 bytes
SHA-256: ca09f57dc4e589bb2b5ac27cf959be0c705ccf68038172141b97e33079c2364a
font_01_sfnt_off000140ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EC 14496 bytes
SHA-256: 7984971d2680cd5a9d84a29edf808355bf34bf3ca95e1a0b9a922b63a0daf37f

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