Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a709c1d2d4a850…

MALICIOUS

PDF

27.8 KB Created: 2021-07-04 12:31:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c5803ce0aa0632eb4500cfa67e5dbcb7 SHA-1: 52b0d17c358cc3832cf2edf0ac8af446b4105f44 SHA-256: 18a709c1d2d4a850f6e661e8ecb138e8f8a6149d42873a401fe7f45ecea04f75
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it's a lure for game hacks, specifically mentioning 'free Robux' and linking to a URL that appears to be a redirector. The ML classifier also flagged this PDF as malicious. The embedded URLs and document body content strongly suggest a social engineering tactic to trick users into visiting potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 3

  • 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.
  • 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/431946152/free-robux-videos-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-any-person-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-robux-hack-free-robux-generator-uirbx-club_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hack-clothes_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/area-27-hacks-roblox-yt_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C2 21740 bytes
SHA-256: f4b97f281a601c574285665a2355b5ad98e346a995279f8d8d14e21d4c88e577

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