PDF malware analysis — malicious · c22d24df3dd9dda0

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 06:22:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 13616ee6d1fa25b720a06fedb46360e4 SHA-1: 4ccb39b14a57e52afa7e65fcec1378c1b811608f SHA-256: c22d24df3dd9dda07d7251b0a94dfb3fe50ad0b7fba9fd12293c5b069939adfa

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to a known malicious redirector, disguised as a 'free generator' or 'game hack' lure. The primary URL, http://netcdn.co/app/431946152/como-conseguir-robux-gratis-sin-hacks-2021-game-hack, is associated with a high-risk redirection chain. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit user interest in free in-game currency to deliver a secondary payload or phish for credentials.

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.co/app/431946152/como-conseguir-robux-gratis-sin-hacks-2021-game-hack In PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/make-a-free-game-like-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-how-to-get-free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/apk-free-download-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/being-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/worst-client_GM479516143.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-have-roblox-run-with-cheat-engine_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
- https://www.poc-helmet.com/ckfinder/userfiles/files/bunny-face-mask-roblox-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_off0000319e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x319E	22040 bytes
SHA-256: `8f8f0d3031225b5ff6a367f6140e2478c8d1512c831ed782d7fe464dd3dc6765`
`font_01_sfnt_off00006254.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6254	19608 bytes
SHA-256: `f1167e9245234f7e6026c69018d467a870d7b8120dad47b63f55e3db6a1d101c`

Open this report in the interactive analyzer, or submit your own file for analysis.