Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d86d740b208c902…

MALICIOUS

PDF

34.3 KB Created: 2021-06-21 12:40:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f33b3deef9b13faa2d61d8837bc9671f SHA-1: a992eae613b321546780475113375d21cf4d4f29 SHA-256: 0d86d740b208c9027a24b910f7a6b18188b485b547f61a96f431244c5652f773
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free in-game currency, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it contains external URIs and a game hack redirect lure. The document body, though partially corrupted, contains URLs that reinforce the lure.

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.co/app/431946152/builder-assistant-roblox-free-game-hack PDF link annotation
    • http://regiefranchet.fr/userfiles/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-cool-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-tiktok-followers-real_GM835599320.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/roblox-free-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/roblox-r2da-hacks_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-minecraft-no-virus-free-robux_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/roblox-inappropriate-games_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_off00002e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E86 22460 bytes
SHA-256: 8b6931aaaf95d8f30a95400d843d0d481637dee3e070ff1d4cdc666c471832aa
font_01_sfnt_off000060b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 19188 bytes
SHA-256: 153d57f445d104fa9573de2d7bd195e34c0d2f8b21eee876aaf7a5e13c861869