Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f726cdb205765a…

MALICIOUS

PDF

81.9 KB Created: 2021-03-30 10:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c94ddc3cf2077ea00ed96bd699705dd1 SHA-1: 2991bfd0c27a7b09414dca2cde62ba192f2b3b97 SHA-256: c2f726cdb205765ad80c451a0afbbadb020dc436fa710abc82407fb84c5ee481
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded malicious URL suggest it's designed to redirect users to a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=how+to+sync+sylvania+bluetooth+speaker In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_6048c8b8e8410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465949/normal_605f8fa4df205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367302/normal_5ffd12e5d1ab4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470833/normal_5fe3e971c6cb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_600e2135eb656.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/genukopapovixo/juxozufijazifam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68eb60bf-40b8-48d8-820c-0e9247770fc0/word_formatting_symbols_circle.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/vanegilivemu.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/bosipepedalesuz.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/55950725016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/829a2139-8aee-4d8c-9ed5-5e810bfa7ad9/how_to_replace_beats_solo_wireless_ear_cushion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3196f88d-a0fe-4a30-87d5-5ad11aac84da/kowimutolojutoxop.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/how_to_adjust_temperature_on_reliance_water_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37407157-db90-49f9-a9c2-04ee862ad91b/65195539289.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/nepodel.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/72138857228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d80fd7-5afd-4ff9-a07b-3335b6f6821f/5457402880.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/bukigeganodamifoguto.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/43609948576.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/66504662670.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/how_to_get_my_act_workkeys_scores.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/who_sang_nessun_dorma_climax_the_best.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_off00010219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10219 5440 bytes
SHA-256: 7da27f9992974a857aef06929ca925deaee64c898bed4b2c715a90989c136905
font_01_sfnt_off000114ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AD 11036 bytes
SHA-256: b2ffe6980a546f735d86e0d71669c68be7668aa7865eff29fbb5fcf7dddcd8a6

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