PDF malware analysis — malicious · 97adbcbc9878d937

MALICIOUS

PDF

33.8 KB Created: 2021-06-30 05:47:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 17146586e7105b672187c61cd9f83f2f SHA-1: 181a39fa6bf11c003f2aa362257df2ccf16c4e15 SHA-256: 97adbcbc9878d937dcb26aff16beca106b2937870714b77e1e6490afe4c689d9

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links and a direct URL, likely intended to trick users into downloading malware disguised as game hacks or cheats. The presence of a 'download button' heuristic further supports this malicious intent. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of a harmful payload being delivered.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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.co/app/431946152/boku-no-roblox-hack-game-hack PDF link annotation
- https://www.tw-storage.com.tw/upload/files/how-to-get-free-stuff-on-roblox-catalog-2021_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/best-free-admin-games-in-roblox_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/change-walkspeed-in-cheat-engine-roblox_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-ajuto-clicker-is-it-a-cheat_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/infinite-essence-roblox-booga-booga-hack-2021-october_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/cheat-roblox-madcity-money_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-offers_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-free-spins-link-no-verification_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
`font_00_sfnt_off00002e7a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E7A	22172 bytes
SHA-256: `a3837be8541d30f135ce0a1656fdd83626ba5ae892fdce0300fb8982dc4e2b10`
`font_01_sfnt_off00005fce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FCE	18796 bytes
SHA-256: `19135353552efac95f1c00fc10c19e7b17473ce31d967bef669c8f4fb6ca84ac`

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