Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e4485af3430984…

MALICIOUS

PDF

71.0 KB Created: 2020-12-29 20:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 14615bac72ad5cceca027dda8c01ccfb SHA-1: b7295509cb4c53af52b22e66dc8a6572d300ca58 SHA-256: d6e4485af34309845a3dda3cf8472e5dc7438527bbdcaddb78bc24d4b403872e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, trafffe.ru, which is likely used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often abused for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=chess+play+learn+free+classic+board+games PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422640/normal_5fcad1b222819.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/QY4QPha/doom_2_walkthrough_level_8.pdfIn PDF document text
    • https://cdn.sqhk.co/mekizojo/jgSp2SE/faxuvaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/hf2RGja/jebewixanofavimadu.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/jb0XVsL/weather_nyc_today_hourly_accuweather_forecast.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_5fa22c38c13de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_5fdbeb1210257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_5fab1178844ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420743/normal_5fa32004f0dde.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/ditiruz/arabic_calligraphy_fonts_free_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41cb7acb-7a33-41ce-ad44-9c3cf9de8d01/robin_hood_kevin_costner_pelicula_completa_en_espaol_latino_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/translate_chinese_file_to_english_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/bernard_controls_actuator_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/970d67a1-041f-4ce8-98ec-9e4877f2d02a/rule_34_shrek.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_off0000d531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD531 5716 bytes
SHA-256: 1caf60bc6811edd97f91e81250920c4e386f13d37a5980e4277730b1cdac109b
font_01_sfnt_off0000e87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87D 11208 bytes
SHA-256: a11b5e8a0ed19a00eb9eafe296f5fd0be17e18cc10dcde61d9a95dff532d7b48

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