Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6092894674a24c…

MALICIOUS

PDF

94.1 KB Created: 2021-02-08 16:25:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8a81cd1f773767acb9292de493c8e2da SHA-1: 502a26c79eab05264162ee312c0c72f1c1bb7b00 SHA-256: bb6092894674a24cc992a666a5a053e56cfaeddb22f7a22f598207e0de39682b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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://crophysi.ru/123?utm_term=bioethics+internships+summer+2020 PDF link annotation
    • https://cdn.sqhk.co/levowexesu/ieJqicZ/alliance_teleport_pack_guns_of_glory.pdfIn PDF document text
    • http://tosety.xyz/maze_runner_characters_ageswh4aa.pdfIn PDF document text
    • https://cdn.sqhk.co/ropikenetu/eheI08q/toon_strike_force_airplane_shooting_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/JfRghig/ritonogopaxok.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/Btijd11/29751110448.pdfIn PDF document text
    • http://sfhgfje5df.xyz/tefifudiduloguvejapx0t8a.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/VHOgfcS/the_dark_pursuer_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/m0q3hho/favavij.pdfIn PDF document text
    • http://art-practice.org/encuentra_las_diferenciasdjc6j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393647/normal_601e3402a1d5b.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/VV2fCUB/best_glitch_camera_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_5fc80dbbbca91.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/Q4rjcij/vokupijuvamotugumilejod.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/jIdechf/my_electric_meter_is_blank_british_gas.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/Cijc8Hn/65795233418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490367/normal_5ff808c16ab92.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/ichAoeE/86594756155.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/kikunojulejuj/salet.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/75204505125.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/sailing_for_adventure_sheet_music.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_off00013262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13262 5256 bytes
SHA-256: 5abd3c27f12c938810adf66c691d4207c8b11fdd18132a0c6c2c1a5fdf669a2d
font_01_sfnt_off0001441e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441E 11536 bytes
SHA-256: ef573a32bdf95c1770da804554c44c37c92a9d7f86bc5416b7d768ae8cfcdcfc

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