Malicious PDF — malware analysis report

Static analysis result for SHA-256 0738d7e2fc392675…

MALICIOUS

PDF

43.9 KB Created: 2021-06-09 08:05:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 793a26395dfcfe7b083853ac4183fbff SHA-1: 4f3fdfce61f586d87976420f4de4bcaa72788c8e SHA-256: 0738d7e2fc392675364259a86e24bda5205368ffe6c3ec0feeb05a49f4287f28
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 0.9865

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 https://netcdn.tw/app/431946152/free-roblox-dlls-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-hack-that-easy-and-o_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-phone-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-cheats-switch_GM479516143.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
stream_004_off000050ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50AC 24964 bytes
SHA-256: a2d8da73283e645b02b35099fd96b6e9c37037aa2c53b7f51b51154adbf9eb4e
font_01_sfnt_off00008970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8970 18116 bytes
SHA-256: a0b13bee51319334e42dfb3550e924080700c4c0d9d6e89f105082a52fb32436

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