PDF malware analysis — malicious · 3d74e04740c2e0ab

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 05:36:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 5aec9c115338bb4ed390f0a729fdc42d SHA-1: d835eb3bc4767becc5e07ecdd006c8a48dadcd2a SHA-256: 3d74e04740c2e0ab48c9f8459dbb3cc5d58b81e1909d07e980d1e9efffee820c

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document employs a common lure of game hacks and free currency to entice users to click on embedded links. The primary link, http://netcdn.tw/app/406889139/coin-master-hack-download-2021-game-hack, is flagged as a redirector and likely leads to a malicious payload or phishing site. The ML classifier strongly supports the malicious verdict, and the document's content and structure align with social engineering tactics.

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/coin-master-hack-download-2021-game-hack PDF link annotation
- https://www.captaingogo.com/uploaded_files/userfiles/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/roblox-free-robux-net_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/hack-to-get-shards-in-roblox-shard-seekers_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/get-free-roblox-robux-on-therobuxapp-com_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/the-wild-west-roblox-free_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/cheat-roblox-all-games_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-robux-for-roblox-cheats-and-guide-download_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.captaingogo.com/uploaded_files/userfiles/files/free-robux-on-ipad_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_off000031c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31C5	22296 bytes
SHA-256: `4deff0e647e04bf5ac5f7e9c55a41c054b5b2a56df42bae7b9525d49e54b628a`
`font_01_sfnt_off00006325.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6325	18988 bytes
SHA-256: `24c61ec5dda380d335f70cf248a1dbd8858f35ecf964e4cb835eae0821bc023c`

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