PDF malware analysis — malicious · 93812edb2f4db806

MALICIOUS

PDF

45.8 KB Created: 2021-05-17 21:20:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 24e0f08a8a2b02aea6c4f99a5a618dd3 SHA-1: 6f7a4722cb960522586f06fc1561720d546c018d SHA-256: 93812edb2f4db806a595a6f769ca8a7bf65e98bf0e663b417b71000c1336406f

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a 'game hack' lure, indicating a social engineering attempt. The primary URL, https://netcdn.xyz/app/406889139/i-didnt-get-my-free-spins-in-coin-master-game-hack, likely leads to a malicious site designed to trick users into downloading further malware or divulging credentials. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/406889139/i-didnt-get-my-free-spins-in-coin-master-game-hack PDF link annotation
- https://www.twpuc.com.tw/upload/files/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/how-to-win-robux_GM431946152.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/www-rbxhut-com_GM431946152.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/minecraft-java-code-free_GM479516143.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/coin-master-heaven_GM406889139.pdfIn PDF document text
- https://www.twpuc.com.tw/upload/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004ce7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4CE7	25564 bytes
SHA-256: `80fe5ffdbb370a6e40842a1b808942c2243edef04af2a8344fc09b46c62b581c`
`font_01_sfnt_off0000865f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x865F	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off00009011.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9011	18408 bytes
SHA-256: `1118565247505be74bb0ed189a3b4637fe958dfb480a14239bd8a4b20068b712`

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