Malicious PDF — malware analysis report

Static analysis result for SHA-256 739f8a441ae94c1a…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 11:40:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8b218de8bd3c6b7aef0523b2d5be2a21 SHA-1: 529f9098ad76a01223da04643885263a9e0ff045 SHA-256: 739f8a441ae94c1a0181368b71fae5484889b735b3cb79768baf448d06d074d6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-android-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/how-to-get-free-xp-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-adopt-me-how-to-get-free-money_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/fastbucks-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pet-sim-online-hack-download-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-stuffes-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rocash-com-earn-free-robux-by-watching-videos-and-completing_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-vip-cheats_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-accounts-2021-with-pin_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-dance-your-blox-of-cheat-for-focus-points_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-murder-mystery-2-wls-3-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3145 22092 bytes
SHA-256: 84ec2ec4f9a11b9aa4a4b65a360ecaddbcbe0acd9283b3275f624a93da260643
font_01_sfnt_off000061c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C2 18336 bytes
SHA-256: 5e3aa0b6b74beea0410204074b4143aac9fd3082465f340837d7717624ca45a6

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