Malicious PDF — malware analysis report

Static analysis result for SHA-256 c658a3609c079bfb…

MALICIOUS

PDF

84.0 KB Created: 2021-03-30 09:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3b221e5ccd530955e695e657bd4e9205 SHA-1: 51d84501036c8f12e94cbacadb90333a04318bb4 SHA-256: c658a3609c079bfb6a03607d5b6265a88d218593786aa86cf886846ad0b5181e
96 Risk Score

Malware Insights

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

The PDF file contains a URL that mimics a search result, likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/123?utm_term=android+auto+spotify+voice+search PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379968/normal_600e44db8d7c3.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/wMjjigY/pandemic_coronavirus_live_stream_oms.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/jeRWytw/wosojuviguviduwefalisidi.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/8rkjfje/blocky_highway_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_600a124b2e212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_6034ca358edd4.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/nchjahe/quote_neighbors_friendship.pdfIn PDF document text
    • http://webdefilmizle.com/bhagavad_gita_summary_in_telugup3kzs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_600df231c7a03.pdfIn PDF document text
    • http://peuer.xyz/kafexujelesokolnpym7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_605feab4f39c1.pdfIn PDF document text
    • http://irisca.online/multiplication_flash_cards7gawz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_600de1e2ed614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_60267b44ec5b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/puxonusu.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/snaptube_para_celular.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/26516690179.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/zevemukimepepuxivoderotop.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/sarilipoxuturatup.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/allergen_info_sheetz.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/blackbird_sheet_music_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/69334244163.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/restless_heart_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB76 5244 bytes
SHA-256: 8f49f499a6c6121f9454a862f48a3ca67168bac8a8806481f993863b09a28be2
font_01_sfnt_off00010d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4F 10940 bytes
SHA-256: a89aa2447d1159360b4c013469fcceceb93932e2ea008f9945b9f3b397990fde
font_02_sfnt_off00013290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13290 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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