Malicious PDF — malware analysis report

Static analysis result for SHA-256 e694abc87ef9aeae…

MALICIOUS

PDF

42.1 KB Created: 2021-04-26 22:27:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6223fdec187d35b5720f0644db6e54b4 SHA-1: 0e1033ea6bfd5026fec92e3ff8d4f44f9d28947a SHA-256: e694abc87ef9aeaeb255bbed8c744c23e9871bf3a1b4566262a7ef5bc2e062fa
82 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites, many of which are disguised as game-related resources such as 'free generators' or 'hacks'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a social engineering attempt to trick the user into clicking these links, likely leading to the download of a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.xyz/app/431946152/logo-roblox-hack-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/roblox-free-robux-no-real-money-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-blue-hats.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/breaking-point-roblox-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-noclip-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-how-to.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-noclip-cheat-engine-lua.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-limited-time-offer.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-mode-menu-roblox-jailbreak.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/big-games-free-pet-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/gametest-roblox-robux-hack.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_003_off000040d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40D8 28772 bytes
SHA-256: e9ae9e7199524ab22c1be2ae36848c55b70b4dbe2d755afa4a5e3c3106dd8631
font_01_sfnt_off00008261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8261 18468 bytes
SHA-256: 1f53386a9914a037a712cc52af9c36a9ee74966057c7aaed48f203f79449b748

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