PDF malware analysis — malicious · a8dd07f605a60355

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 10:35:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 3fb67d3548f3fa679eeb0c613554ffd4 SHA-1: dd9b8878ff23a3dda0dd85346132ae45357f3929 SHA-256: a8dd07f605a60355ed0d824101862fac85d64eb5e5e45a25573b51455426f53a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains a lure for a "Coin Master Hack" and links to external websites that likely host malicious content or further redirects. The presence of embedded URIs and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially harmful software. Although no scripts were explicitly extracted, the PDF structure itself is used to facilitate the malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/coin-master-hack-apk-april-12-2021-game-hack PDF link annotation
- http://kumotor.com.tw/upload/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/easy-roblox-today_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/robux-free-robux_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/minecraft-com-free_GM479516143.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/free-robux-no-human-verification-or-survey-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_003_off000048a7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x48A7	25172 bytes
SHA-256: `ebf79ce092617e8726d694ab442a14b98e7cb4786aca1a0457402625300542bb`
`font_01_sfnt_off0000831e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x831E	18368 bytes
SHA-256: `3b30659feb21661d356217d8966cbd258fac2e7fc1ab43a41212753c361910ee`

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