PDF malware analysis — malicious · a65e997e68d95ea6

MALICIOUS

PDF

33.3 KB Created: 2021-07-19 16:23:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: b4c327456e0d687570902a34cd7ff3a1 SHA-1: a0fe7eb86e146e390ee6907638aaa28499108581 SHA-256: a65e997e68d95ea689b254f80ea5a551f3d2f69b9ac7771114096054affe983d

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 redirectors and infrastructure, disguised as "free generator / game hack" lures. The document body and embedded URLs strongly suggest a social engineering attempt to trick users into visiting these sites, which likely serve as a distribution point for malware or phishing content. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious payload delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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-no-verification-game-hack In PDF document text
- https://hekl-software.de/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
- https://hekl-software.de/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
- https://hekl-software.de/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
- https://hekl-software.de/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://hekl-software.de/images/get-free-robux-now_GM431946152.pdfIn PDF document text
- https://hekl-software.de/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
- https://hekl-software.de/images/free-coin-master-links_GM406889139.pdfIn PDF document text
- https://hekl-software.de/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://hekl-software.de/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://hekl-software.de/images/roblox-free-robux-hack_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_off00002c2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2C2D	22576 bytes
SHA-256: `d9cb1aa89421bee4a393d4b332c69f8317446231a611cba3f89331777f21ef0c`
`font_01_sfnt_off00005e92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E92	18788 bytes
SHA-256: `62238c1786e5e6676ca02185530fe02245788409f30e6753b3bb97f9a85103fa`

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