PDF malware analysis — malicious · 67d9cf2db7bbad13

MALICIOUS

PDF

31.4 KB Created: 2021-07-19 08:11:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 50457c088045653cadc60fae3b03f660 SHA-1: 72d4113e54c93b14e26c2093f98a3556c8373c3a SHA-256: 67d9cf2db7bbad133ca9e185f3ddf3ffab1bd0e647b5a5fb9bb7991bf79f811a

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links designed to lure the user into clicking on a redirector URL, which is flagged as malicious. The document body and embedded link actions suggest a scam related to 'free Robux' or game hacks, aiming to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a high likelihood of redirecting to a malicious payload or phishing page.

Machine Learning

Nyx PDF Classifier malicious score 0.9893

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/free-robux-co-game-hack In PDF document text
- https://www.polyfin.de/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
- https://www.polyfin.de/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.polyfin.de/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.polyfin.de/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.polyfin.de/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
- https://www.polyfin.de/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
- https://www.polyfin.de/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
- https://www.polyfin.de/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.polyfin.de/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- https://www.polyfin.de/images/can-u-get-free-robux_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_off000027cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x27CC	22068 bytes
SHA-256: `03b5b5ee5b9185bfa47c5c3e3bdadcfc39148978c5ab030351a952ef2af0abc8`
`font_01_sfnt_off000058a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x58A7	18200 bytes
SHA-256: `af0a6f01588019b38fd5688102a8ebe17e4b5155afa3360a762aee3dff872896`

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