PDF malware analysis — malicious · ed27a22383bf0b12

MALICIOUS

PDF

44.8 KB Created: 2021-05-11 06:11:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: bbf1ccfde7f46baa6301f6e010d544a5 SHA-1: 2757c6338d1dfea290b6ecb2069f54182b46018e SHA-256: ed27a22383bf0b12fee335c7322ea5d032825a8c78c6ff5f50031fedf445273a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://netcdn.xyz/app/431946152/how-to-change-roblox-username-for-free-2021-game-hack PDF link annotation
- http://kumotor.com.tw/upload/userfiles/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.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-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/free-roebucks-com_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/robux-in_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
- http://kumotor.com.tw/upload/userfiles/files/coin-master-heaven-links-free-spins_GM406889139.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_off00004d13.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D13	25700 bytes
SHA-256: `e40d12794ad82d36ebf85dfe4c912e1122412c3f4ce3984acf9d9d704f9150cf`
`font_01_sfnt_off000088f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88F9	19644 bytes
SHA-256: `bf7704042115058311276e91f581871491bc3524547d766b0e7085d334bb6686`

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