Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc4d973302df9ed…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 05:18:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 62159a7b9241bcb6727ef372e631abfa SHA-1: beff17bce0ab19ee04b0fb55a7497a5809750e1d SHA-256: cbc4d973302df9edf0ac98aaf0e32d9decb5d83807f10623e6ce1e3d8e564962
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to a known malicious domain, masquerading as a 'free generator / game hack'. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/robuxmatchcom-free-robux-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/best-free-avatar-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/get-robux-for-free-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/cheat-engine-cheats-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-free-admin-commands-on-roblox-for-kids_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-codes-october-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-brick-bronze_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-with-free-robux-apk_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-hacks-teleport_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-roblox-outfits-for-boys_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-redeem-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/easy-robux_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_off0000304b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304B 22656 bytes
SHA-256: 09592d571fb5be9238c53474088fe1026e464327efafbe8dbb3ad376a1383bcd
font_01_sfnt_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 19244 bytes
SHA-256: cff0d4d21023d1d0af59a0abdc5d0297996ab287ec72876132611e0e39db5cae

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