Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a0635d8da11246…

MALICIOUS

PDF

65.6 KB Created: 2020-12-16 22:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: efc982c13147bde044ebf43c55e48b55 SHA-1: 05d747dcb0eb931055f0c1dadcb4fa011e442ba0 SHA-256: 36a0635d8da112466f6c0cd656772e6ab01f8aca258907f5d105786cd33d5520
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URL pointing to 'traffset.ru', which is likely used for phishing or to serve a second-stage payload. The document body, though heavily obfuscated, appears to reference 'Cheers season 11', suggesting a lure to attract user interaction.

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://traffset.ru/strik?utm_term=cheers+season+11 PDF link annotation
    • https://nutiduvurenomal.weebly.com/uploads/1/3/4/6/134681926/lisagejujabafa.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/629ee14e96be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/radaruropivoje/the_crucible_act_three_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/jasateduru.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc509f16b97992eb5765355/t/5fcbaf1bbce7087d1ae30054/1607184155454/jozogozupoganuteja.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/verbos_uniformes_biformes_e_triformes_exemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/project_management_functional.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/93095690665.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e7ad6609fd0ee79153f2/t/5fc1c7644f9837572021d659/1606535012880/4521052215.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/guerra_de_los_pasteles_mexico.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a2a4f9cd615d7ca8f756/t/5fcd5c479aa2de0c64a4ee6f/1607294024373/74158889517.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc566ac3dfdd95b60f3409b/t/5fcccfac5177ea328cc04f99/1607258029486/into_mirror_gameplay.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_off0000c3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FA 4700 bytes
SHA-256: 5e5df5a77981b66b8fb5f8c27ee01164113c7b2f5c04992780ff672825528d99
font_01_sfnt_off0000d3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E6 10584 bytes
SHA-256: b023d01f4e5c03c5557cf5b94c782406586af42f961d907c4556cca628931a6d

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