PDF malware analysis — malicious · 3b29c2035c0d2e12

MALICIOUS

PDF

33.8 KB Created: 2021-07-09 09:59:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 194ca7ce19ca6e96ff8226b2263bb599 SHA-1: 81bc93a24948683eae04d387b4f7b1bc43ad32f3 SHA-256: 3b29c2035c0d2e1296073029d877e5252c0518cfd7b79a941640c7ad850c5b8a

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that are identified as malicious redirectors, specifically targeting users interested in game hacks and generators for games like Roblox and Coin Master. The primary malicious URL, http://netcdn.tw/app/431946152/roblox-hack-tool-game-hack, is designed to lure victims into downloading potentially harmful content or visiting further compromised sites. 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 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-hack-tool-game-hack In PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/corn-master_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-robux-no-password-or-human-verification-2021_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-hacks-for-phone_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-spins_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-free-fraw_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-hack-robux-into-roblox_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-link_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/new-claim-gg-promo-code-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-gift-card-hack-100-working-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-apocalypse-rising-spawn-hack-2021_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/get-free-robux-without-verification_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_off00002f43.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F43	22064 bytes
SHA-256: `507c596109c4c13088b97e7aaada57942d9f07130eee567419d49bd8aa55d9b7`
`font_01_sfnt_off00006020.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6020	18656 bytes
SHA-256: `e8d3b80f1b6f2c9c2bf73e7970ea5f3b8003eca05e06d1d82551611c8be56651`

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