PDF malware analysis — malicious · d6cc9950bdd38eee

MALICIOUS

PDF

35.2 KB Created: 2021-07-09 00:21:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04

MD5: 49531573467b307eaf7d087fd8e47675 SHA-1: 62f6f9e24ddbf5139b0f2082f1006283d7463633 SHA-256: d6cc9950bdd38eee7d27edf100ff8763c2458320b96eb055be0593e8019f94fa

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains multiple embedded URLs that redirect to potentially malicious content, including other PDF files hosted on suspicious domains. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious workflow designed to lead users to unwanted or harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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/coin-master-free-spins-link-2021-twitter-game-hack In PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/tiktok-free-prints_GM835599320.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/free-group-roblox_GM431946152.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/free-code-for-call-of-duty-ww2-roblox-pastebin_GM431946152.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/cops-and-robbers-roblox-cheat_GM431946152.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/roblox-mad-city-hack-pastebin_GM431946152.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/how-to-get-free-views-on-tiktok_GM835599320.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/roblox-hack-robux-generator-ipad_GM431946152.pdfIn PDF document text
- https://biospray-online.com/ckfinder/userfiles/files/elysian-roblox-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
`stream_002_off00003135.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3135	23100 bytes
SHA-256: `cd915b45fde7c1061e553f07e700cdc3cc472dcffa16ed9d0346321453d8f393`
`font_01_sfnt_off00006508.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6508	18908 bytes
SHA-256: `b043e4a019f31cebff09b938e1120b84c3066f7adfb90df1330482920140b640`

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