Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cfd0554f540a340…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 15:42:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 70443fa2e2810f4ae54e66266a0f0180 SHA-1: 31ab52c6eeeb581d0f7eba665a54decb72e850fa SHA-256: 4cfd0554f540a340bacc9be30108470fcd77f44b0b871c2a10c4155bf57a5bd4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that redirect to websites offering game hacks or generators, such as 'tiktok-free-vs-premium-game-hack'. This lure is designed to trick users into clicking the links, likely leading to malware download or further exploitation. The ML classifier also strongly indicated maliciousness.

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.tw/app/835599320/tiktok-free-vs-premium-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/robux-robians-robuxs-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-de-carpeta-atravesar-paredes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-1-million-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/cheat-dbr-roblox-ccv3-20218_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-accounts-with-obc-2021-discord_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-free-account-dump_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-for-kids-easy_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robloxland-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-games-that-actually-work-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-obc-generator_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-game-free-play-online_GM406889139.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_002_off00003080.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3080 22384 bytes
SHA-256: 2670947a580f45f3e8230a7be0540a7aa89c1da2015ae1651b94eb3b4af5bf7e
font_01_sfnt_off00006276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6276 18660 bytes
SHA-256: 912be5dbb6054034a572a542a3c86d15606142773fcf5ceeff56e60f9cb93bb8

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