PDF malware analysis — malicious · 83336847bd341939

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 05:37:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 62eac281b2a012f23534fca62d058057 SHA-1: 943e5dcbd8a532417d1f7debc9666de0476de6e3 SHA-256: 83336847bd341939d82e92f2ef23eec28d58d1518cb45fb393fdc791692fd1f9

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising free game hacks and generators for popular games like Roblox. The ML classifier strongly flagged this PDF as malicious. The primary lure appears to be a 'free generator / game hack' which redirects to http://netcdn.tw/app/431946152/wahoogaming-co-free-robux-game-hack, likely leading to further malicious content or downloads.

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/wahoogaming-co-free-robux-game-hack In PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/free-robux-generator-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/free-medieval-clothes-on-roblox_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/website-roblox-free-robux_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-god-simulator-hack-gui_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-get-black-wings-in-roblox-for-free_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/5-hacks-in-roblox-games_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/free-robloxcom-accounts_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-cheat-on-roblox-tycoons_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-free-download-pc-windows-7_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-gun-game-hacks_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-gang-rape_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-get-your-old-hacked-roblox-account-back_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/how-to-get-free-robux-on-sumsung-tablet-easy_GM431946152.pdfIn PDF document text
- https://trustindoutama.com/assets/CKImages/files/roblox-free-hoodie_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_off00002ff3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FF3	23540 bytes
SHA-256: `2c49783ac26e41d0d65e1df14ea0aaac9f3423b13f2f615181d3970904d0d7e6`
`font_01_sfnt_off0000645b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x645B	19460 bytes
SHA-256: `74065a4619e2e03bb286e1d51fa8cb1024f73915723fc40e3305b74db5537c96`

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