Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2cd6a608ed59b8f…

MALICIOUS

PDF

76.3 KB Created: 2021-05-22 19:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 319285de3b146f711af9be94bd16b257 SHA-1: 68b1f8f1a4afbfcbe01b698ea90eabb2b34adf87 SHA-256: a2cd6a608ed59b8f4b6ff749e94e8fab00fd3ee3df5dca65258a14d65033565c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'leonvi.ru', which is likely the primary lure. The document body, though heavily obfuscated, suggests a pretext related to research, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/strik?utm_term=what+are+the+strengths+and+limitations+of+qualitative+research PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454544/normal_602be77c9e87b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462678/normal_5fc6f39049eff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365549/normal_6032e969dc656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466391/normal_601124ea368c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462976/normal_6052edd440e81.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/daniwodug/27402278941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3dd988a-a4c0-4316-8f94-742219636356/eurodesk_sx2442fx_manual_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e86e9a-40ba-4df9-806e-828e47206fcc/10097564539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f516240-328c-4823-a174-a536dc85451c/is_screenwriting_a_realistic_career.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/tasibidobulukolonokori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a418fc2-44cf-4ab4-8baf-73393dbdf1bb/91938230822.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/firefox_50_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a652ef5-4958-47c1-a733-cbeb279a2d73/leaf_footed_bug_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4a5303-0704-4b7e-9f9d-0d9dc7b17bc7/courtly_airs_and_dances_movement_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e40fab6c-75b3-44c3-955f-a2cd1fc9713a/49700009224.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/maytag_quiet_series_200_dishwasher_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a214c146-accb-4233-865a-441dd57343ef/gigilunujemaleratot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e91a0ac3-34fe-4541-909c-1ba03db26d70/13117256138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2004225-21f2-457a-ba6f-7f6401625818/13670321577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c1c2fd-7af2-4fe7-8528-cc51c0d50ceb/nunileje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9e9d0f-f826-41a9-b502-e49759ebb910/48354502887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc3c9cc-1506-45ab-8857-e39c306a19b9/what_is_maternal_health_and_neonatal_nursing.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/93001339052.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/whats_in_a_nacho_bell_grande.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f93c3ca-fada-4d88-8bdc-79bd8d959692/how_to_write_a_movie_script.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_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 5636 bytes
SHA-256: 34248ed683475fb1601613f5f0468a6e91f6e7bd5bd85579dbf1d28fcc12341a
font_01_sfnt_off00010120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10120 10188 bytes
SHA-256: 78ee593fd8e92291cba20c35b27914adfaf9fa46f6db8a6d3ae7b40cbe45e01e

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