Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf00ad48d30a3d7c…

MALICIOUS

PDF

36.6 KB Created: 2021-07-05 16:22:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f6893039d1b9f73af3c3713d0b2170a0 SHA-1: f0c2355eb2d4c86121ed497c59cc71abaa102b7d SHA-256: cf00ad48d30a3d7c85f83f94c7ec9182caff3faee12e8e30fea7eab08fa03095
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to the URL http://netcdn.tw/app/431946152/roblox-teethyz-dentist-how-to-get-free-points-game-hack. This URL is also flagged as a known malicious redirector. The document body, though partially corrupted, contains references to game hacks and the malicious URL, reinforcing the lure. The ML classifier strongly indicates maliciousness.

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/roblox-teethyz-dentist-how-to-get-free-points-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-avatar-free-boy_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/pokemon-go-free-and-home-transfer_GM1094591345.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/medieval-hood-of-mystery-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-roblox-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cheats-to-get-cars-in-car-crashers-2-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-roblox-steve-one-piece-roblox-auto-farm-chest_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/tshirt-adidas-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-work-at-a-pizza-place-cheat_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-pin-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-cheat-engine-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-bypass-roblox-anticheat_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-with-no-verification-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
font_00_sfnt_off00003506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3506 22696 bytes
SHA-256: b96674929d021d2e57535bda8ee572c1908a9c8e9dc143933fb95db7daedaaf6
font_01_sfnt_off000067ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FF 19788 bytes
SHA-256: 9a1ebffbc1aeade8c128df4df67e43496d9fa2c6b24b12fb2d8fa0699cb9dbe2

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