PDF malware analysis — malicious · 1e821c8bc9a1dced

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 16:58:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 91d52b2086566cce8b740a267745b0c4 SHA-1: 17385890fa6c8c0a76df9fe90dd867252255a898 SHA-256: 1e821c8bc9a1dced5ca72bbadd382a814b3f2b50fbfbad44f01a7294917b1257

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 http://netcdn.tw/app/406889139/how-to-get-free-spins-and-coins-in-coin-master-game-hack PDF link annotation
- https://www.tiancom.com.tw/upload/files/how-to-hack-and-steal-pepoles-robux-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-hack-infinite-jump-new_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/hack-work-at-a-pizza-place-roblox_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-game-packs-for-coin-master_GM406889139.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/mistplay-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/keisyo-free-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-robux-free-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-tower-battles-hack-script-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-hack-2021-john-doe_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-extension-hack_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-phantom-forces-pepsis-aimbot-hack-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
`font_00_sfnt_off0000309b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x309B	23256 bytes
SHA-256: `ec2d484d456675c78849beb317c49dac0a7fb7a100816d424d671c8d0ac049fd`
`font_01_sfnt_off000064fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64FA	18512 bytes
SHA-256: `54df8a09cf421af6cac57c3a8dff085e717b90c55c616740be0d1644a88c75b3`

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