Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c7d1e4cb8dec52e…

MALICIOUS

PDF

47.4 KB Created: 2021-04-23 11:27:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a0bc93d9ee49b9cea0f979b47b0a6254 SHA-1: 7df6c11f79b193d9d565df65c6ed702a5e68f684 SHA-256: 2c7d1e4cb8dec52e9d1882654f6ba5ed415a345e72dd107c54ab774e4c7e2a02
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains a lure related to 'Roblox Greenville Hacks' and 'free generators', directing users to click a link. This link, 'https://netsecure.top/app/431946152/roblox-greenville-hacks-game-hack', is identified as a malicious redirector. The document also contains numerous other PDF links, likely part of a broader campaign to lure users to malicious sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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.
  • 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://netsecure.top/app/431946152/roblox-greenville-hacks-game-hack PDF link annotation
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/download-free-stuff-on-roblox.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/how-to-get-free-roblox-items-2021.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/roblox-prison-life-free-kill.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-roblox-gift-card-codes-2021.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/hack-block-piece-roblox-autofarm.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-level-7-exploit-roblox-no-virus.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-roblox-gift-card-codes-2021-april.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/roblox-minecraft-games-free.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/chef-free-tshirt-roblox.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/how-to-hack-assassin-roblox.pdfIn PDF document text
    • https://freerobux.cyouIn 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_off0000443b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x443B 39204 bytes
SHA-256: 92804ad8670fc3efc5dae0eafc04f3a0ee03c17680fdc54960cc31fa31a4dc64
font_01_sfnt_off0000979a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x979A 18416 bytes
SHA-256: 6ab7bac2da3c482ee55099fa4d495be40037a4b4a4baa5ab72afc4770d0a00a1

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