PDF malware analysis — malicious · 98a8d75bb2e6596e

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 20:53:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 712f3d29b57dba257e35fb230bd2d59a SHA-1: 4ae0961d4655c47014acdd82db72391316724009 SHA-256: 98a8d75bb2e6596e87589429393226a55b08d277035a5fd9bed0ae410e4f503d

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/431946152/how-do-u-hack-roblox-game-hack PDF link annotation
- https://www.furtherstudies.my/uploaded_files/userfiles/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/roblox-games-robux-free_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/free-robux-mod_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/instantrobux_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/roblox-parkour-cheats_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/roblox-retail-tycoon-hack-script_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/cheat-engine-robux-adress_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/cheats-for-roblox-clone-tycoon-2-2021_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/super-super-happy-face-roblox-free_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/roblox-free-online-no_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/roblox-comment-de-venir-un-hacker-lvl-2021-shinoby-life_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/roblox-level-100-hack_GM431946152.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
- https://www.furtherstudies.my/uploaded_files/userfiles/files/games-like-roblox-but-free_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.

Filename	Kind	Source	Size
`font_00_sfnt_off000030aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30AA	22528 bytes
SHA-256: `b92bf5e18079ce5f2e071c4c09cbbcdb5445b8d7ea574539f402c0a3574fd35e`
`font_01_sfnt_off000062a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62A5	18988 bytes
SHA-256: `c91385222d36a947d3be30eb27485a4efa68f443f62ed41846c800c63ed9c478`

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