PDF malware analysis — malicious · fc3f0f0c30f52543

MALICIOUS

PDF

32.9 KB Created: 2021-07-19 10:29:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: f031cc67b48cd5f0b5bdbd6b4cdf032b SHA-1: 29cdd40f0b084b5ba1db0dbe0d24cdcb198d2883 SHA-256: fc3f0f0c30f525434db309f9980102d3714a6d80d7b4ee7e7a10f4d050ea7174

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as game hacks and free generators. The primary lure, 'free-spins-and-coins-for-coin-master-game-hack', is hosted on a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into downloading further malicious content or visiting compromised sites, likely initiated via a phishing email.

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/406889139/free-spins-and-coins-for-coin-master-game-hack In PDF document text
- http://sfera-express.ru/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
- http://sfera-express.ru/images/how-to-free-robux_GM431946152.pdfIn PDF document text
- http://sfera-express.ru/images/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
- http://sfera-express.ru/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- http://sfera-express.ru/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
- http://sfera-express.ru/images/roblox-hack-download_GM431946152.pdfIn PDF document text
- http://sfera-express.ru/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- http://sfera-express.ru/images/free-robux-real_GM431946152.pdfIn PDF document text
- http://sfera-express.ru/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
- http://sfera-express.ru/images/coin-master-free-blogspot_GM406889139.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_off00002b23.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2B23	23216 bytes
SHA-256: `0399e7716cbc3eaebdd64f9015e40e8e5f7dbd786f347a905e18b0a107a88a56`
`font_01_sfnt_off00005f45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F45	18060 bytes
SHA-256: `d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51`

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