PDF malware analysis — malicious · c2a99aad87d0e472

MALICIOUS

PDF

34.5 KB Created: 2021-07-20 15:31:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: d4ce56fc2f356e6dbcb880882f44bfb1 SHA-1: e9984d7a0e0fcdb7055a9b00cd8133cf26c8883a SHA-256: c2a99aad87d0e4721ad41c4e2c58153dad0ae0b143a28948f8a4b529cb86316c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that point to known malicious redirector infrastructure, specifically targeting users with lures for game-related cheats and generators. The heuristic firings confirm the presence of malicious redirector links and a general lure for game hacks. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious websites, likely for phishing or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9955

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/406889139/free-spin-link-for-coin-master-game-game-hack In PDF document text
- https://pagadder.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
- https://pagadder.com/images/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
- https://pagadder.com/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- https://pagadder.com/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
- https://pagadder.com/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
- https://pagadder.com/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
- https://pagadder.com/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
- https://pagadder.com/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
- https://pagadder.com/images/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
- https://pagadder.com/images/lazyblox-com-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
`stream_002_off000031bb.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31BB	22848 bytes
SHA-256: `abf9edec12b5c88a95f7a30ff654fbe3a5ef2191aa4e113bdb73fb9baaab46cd`
`font_01_sfnt_off0000651b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x651B	18316 bytes
SHA-256: `4ad106dc66915d7a7c54c506e35e2e74cb7406920644c521a55874c4c44ea7c2`

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