PDF malware analysis — malicious · ea551e91898a4e68

MALICIOUS

PDF

41.7 KB Created: 2021-05-11 04:33:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: dd1e3d29f7ba66791774252b00130da5 SHA-1: 8d8b3e1809e0973d8c4a809b1e7b7c52f0fe139e SHA-256: ea551e91898a4e6850fc0da7fcaffd6fb027e105245379d788d8190a9ab95eda

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 0.9971

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/431946152/robux-free-robux-game-hack PDF link annotation
- https://www.tw-storage.com.tw/upload/files/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-strategy_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-free-robux_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-live_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/game-hunters-coin-master_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/daily-free-spins-coin-master-2021_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_off00004809.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4809	24856 bytes
SHA-256: `543ed22cff2c7fa26f238b1384b35385680e34689bd2f91231436f75905bda1c`
`font_01_sfnt_off00008151.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8151	18012 bytes
SHA-256: `3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73`

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