PDF malware analysis — malicious · c0180d4456c729e5

MALICIOUS

PDF

36.1 KB Created: 2021-07-06 07:07:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 7431af3f59ebd2078bfe52746999c1c0 SHA-1: 562697e28bcaf700ad98a020f452be81c4ab9a18 SHA-256: c0180d4456c729e504862ad36eb0dd5e618bc14f7e71d8890b1856596d32aabb

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a lure related to game hacks, specifically for Coin Master, directing users to the URL http://netcdn.tw/app/406889139/how-many-levels-does-coin-master-have-game-hack. This URL is flagged as a redirector for game hacks, indicating a social engineering tactic to entice users to click. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a download button lure further support a malicious intent, likely to deliver a second-stage payload.

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-many-levels-does-coin-master-have-game-hack PDF link annotation
- https://dolphintour.vn/images/uploadsfiles/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-robux-for-free_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/cheat-roblox-lumber-tyccon_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/hack-for-roblox-project-pokemon_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/cheat-fly-roblox_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/where-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/how-to-get-robloxian-20-for-free-roblox-2021_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/proxo-roblox-hack-download_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/hackear-roblox-android_GM431946152.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
- https://dolphintour.vn/images/uploadsfiles/earn-free-robux_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
`stream_002_off000034d4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x34D4	23492 bytes
SHA-256: `982279dc1b114983168672d4a7fc98477e39624fdbbce53e09fde83852f4f033`
`font_01_sfnt_off00006981.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6981	18532 bytes
SHA-256: `73519756161c219c9429bfa0cb2914b64f7e4f466f675339707cc65ed84bb154`

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