PDF malware analysis — malicious · b1773cc70dcd99c9

MALICIOUS

PDF

32.7 KB Created: 2021-07-19 04:54:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: dcee2de3dc366689c7e13933da4109e5 SHA-1: 5793fd0e90e2ebbf9e14208634058545c1a20652 SHA-256: b1773cc70dcd99c93d8484c99c7b21cd5d9b901aac38091a34c36812e9f1edca

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as "free generator" or "game hack" lures. The document body explicitly mentions "Free Spins For Coin Master" and "CLICK HERE TO ACCESS COIN MASTER GENERATOR", reinforcing the social engineering aspect. The embedded URLs likely lead to further malicious content or phishing pages, aiming to trick users into downloading additional malware or divulging sensitive information.

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-for-coin-master-game-hack In PDF document text
- http://only1you.ru/images/free-minecraft-account_GM479516143.pdfIn PDF document text
- http://only1you.ru/images/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
- http://only1you.ru/images/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
- http://only1you.ru/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
- http://only1you.ru/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- http://only1you.ru/images/minecraft-free-android_GM479516143.pdfIn PDF document text
- http://only1you.ru/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://only1you.ru/images/free-tiktok-bots_GM835599320.pdfIn PDF document text
- http://only1you.ru/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- http://only1you.ru/images/free-robux-gift-card-codes-2021_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_off00002a87.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2A87	23252 bytes
SHA-256: `972ecebf31170382fb4deb4cda29fbe6d21f7dfd51b1e36b289f23e253b3a619`
`font_01_sfnt_off00005eda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EDA	17884 bytes
SHA-256: `7a686c540965cac69e1923dfbb6a78ce3f92ec60dbbf6836da21cbb58cd4d6cc`

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