PDF malware analysis — malicious · d20289366859bec3

MALICIOUS

PDF

35.8 KB Created: 2021-07-03 13:23:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 62b372b2d2921a11b3e858e487ec6653 SHA-1: 80791eae691917d9b653f1425d865b30bc0d5dee SHA-256: d20289366859bec30b162a0b37fe4a6b2e1cc365f2812a874d79ed199bb29bef

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/431946152/how-to-get-free-robux-on-roblox-2021-game-hack PDF link annotation
- https://www.kaojen.com.tw/upload/files/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-non-virus-recorder-for-roblox-for-laptop_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coin-master-apk-hack_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-robux-no-password-needed-and-no-verrification_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/coinmaster-links_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-add-a-second-floor-in-roblox-bloxburg-free_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/www-roblox-com-robux_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/new-cheat-engine-2021-working-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://www.kaojen.com.tw/upload/files/how-to-hack-someones-minecraft-account_GM479516143.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_off000033e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33E5	22240 bytes
SHA-256: `ccad8d0da6bbb23ba14e6d3dcf0087a9039d906a7db680c85f55e447327673de`
`font_01_sfnt_off0000655d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x655D	19460 bytes
SHA-256: `a88a3b37d26ae7f28ec6954540056097f0f8d6b678a801dc09bd2df82b34d325`

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