PDF malware analysis — malicious · 0040c2a7cfe05b88

MALICIOUS

PDF

40.8 KB Created: 2021-05-17 21:36:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: b13534417016ea1b95e331ac730420a7 SHA-1: 536c04322650c0212e4f7c1b6dbc509b635c5b5a SHA-256: 0040c2a7cfe05b8854e98d3a3a954dcbb5b26e7c2cf8dbe9cf3d24233babefde

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and generators, such as 'coin-master-hack-8-ball-pool-game-hack'. This strongly suggests a social engineering lure designed to trick users into visiting potentially malicious websites. The ML classifier also flagged this PDF as malicious with high confidence.

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/406889139/coin-master-hack-8-ball-pool-game-hack PDF link annotation
- https://www.yuko.com.tw/upload/files/robux-rewards_GM431946152.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/free-roblox-injector_GM431946152.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/hack-spin-coin-master_GM406889139.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/roblox-free-items_GM431946152.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.yuko.com.tw/upload/files/free-executor-roblox_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_off000046fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x46FB	23752 bytes
SHA-256: `7efaaa01a2857d7b61013919a599e5673b6a6c8ec552b5485560d7b35b115dd6`
`font_01_sfnt_off00007cc3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7CC3	18372 bytes
SHA-256: `a36c8568268bd3843c99b13e037ad7d172b032abb8e2fd77dcfbea09e612cebb`

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