PDF malware analysis — malicious · 7f5705826bbc75be

MALICIOUS

PDF

32.4 KB Created: 2021-07-20 03:24:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: fa74c27ff654db94b720bae51574c59b SHA-1: e723a2796c7a8c9e0749291c63440cc1f23934b8 SHA-256: 7f5705826bbc75be4c43cce39aa7cde53e6fc89e482f54bd9b766e2fcbc2422a

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free Robux' and 'game hacks'. The primary lure URL, http://netcdn.tw/app/431946152/rblx-gg-free-robux-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest a social engineering tactic to drive users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9900

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/rblx-gg-free-robux-game-hack In PDF document text
- https://coplaltd.eu/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
- https://coplaltd.eu/images/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
- https://coplaltd.eu/images/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
- https://coplaltd.eu/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://coplaltd.eu/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
- https://coplaltd.eu/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
- https://coplaltd.eu/images/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
- https://coplaltd.eu/images/free-tiktok-comments_GM835599320.pdfIn PDF document text
- https://coplaltd.eu/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
- https://coplaltd.eu/images/roblox-hack-game_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_off00002970.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2970	22400 bytes
SHA-256: `5fe45529ce99993b1e392da7425dc3b873c51881dd0b06eeb356bbe2ac9494bf`
`font_01_sfnt_off00005b98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B98	18564 bytes
SHA-256: `f0545bb50d1b53ea5a90fdb1f55dd67bfbf281392701ec713f0ee16ca845a558`

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