Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f87cb99b79e673…

MALICIOUS

PDF

54.2 KB Created: 2021-06-03 20:08:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 58e31c1a323f7616805c389002fa61c6 SHA-1: 956bc0f382e2840af447adb76688aa7e07da1fbb SHA-256: b7f87cb99b79e673a6d24014cf59036373a194561b840edda00fb175ff4d0e72
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to 'free Robux' and game hacks, indicating a social engineering attempt to trick users into visiting malicious websites. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs suggest a phishing or scam campaign. No scripts were extracted, but the primary attack vector appears to be a deceptive link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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.online/app/431946152/how-do-u-get-free-robux-2021-game-hack PDF link annotation
    • http://www.perpus.stfm.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-no-verification-no-download-2021_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
stream_004_off00005625.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5625 40660 bytes
SHA-256: 0ffbbfafbd405dc95e884059eee3b8aa3bd3776380f2289558310405a08778da
font_01_sfnt_off0000af8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8C 19040 bytes
SHA-256: 14ed63897d8c38c9b74f4ae6c685ddc963b8153977262fdb6411d06658c720a7

Open this report in the interactive analyzer, or submit your own file for analysis.