PDF malware analysis — malicious · 9de8b8cc53f7e195

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 15:50:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: fce017d42f6441174b7ceeb9d6b47c50 SHA-1: 290f1bb393161624a939f24226fd4979c3bc6a6f SHA-256: 9de8b8cc53f7e1955616ab67c724c542e9df7a8016471e35dac9a4c3e2801ba3

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack redirector, specifically targeting users interested in free coins and spins for games like Coin Master and Roblox. The embedded URLs and document body content reinforce this lure, suggesting the primary goal is to redirect users to potentially malicious websites for phishing or malware downloads. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

PDF links to a 'free generator / game hack' redirector high 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.
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
External URI info PDF_URI

PDF contains an external URL action
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-coins--spins-coin-master-game-hack PDF link annotation
- https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/btools-download-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-safe_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-redeem-cards-for-roblox_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-card-codes-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-no-human-verification-2021-pc_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-promo-codes-2021-no-hack_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/pokemon-go-free-walk_GM1094591345.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-hack-in-roblox-pc_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-hacks-for-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-username-and-password-roblox_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_off00003136.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3136	23812 bytes
SHA-256: `4da798e21fa0e70477e980a7e0362be552683169dd3834769cea1a60573beda8`
`font_01_sfnt_off0000679f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x679F	18176 bytes
SHA-256: `246b8f63ccaeedbc6bff36fe6e73479c50587f584be52e68ff18fc4d6b5689c3`

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