PDF malware analysis — malicious · 3645539e90c2ebaa

MALICIOUS

PDF

34.8 KB Created: 2021-06-26 11:41:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: c803c77be00c22f8c8d5428263f04ebf SHA-1: 251607f59d5fc02ec6f5644a472374a824f0a915 SHA-256: 3645539e90c2ebaa4532a0b62e8b35150a316652e2d567168819820d50e29bd2

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure related to 'Free Robux' and game hacks, directing users to a URL that likely serves a malicious payload. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URL strongly indicate a social engineering attempt to trick users into downloading potentially harmful content. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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/free-robux-counter-for-roblox-apk-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/roblox-people-girl_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-items_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/one-for-all-free-shop-t-schirts-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-do-i-hack-roblox-to-give-me-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/robux-redeem_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-without-personal-info_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hack-roblox-players_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/best-meliodas-roblox-face-free_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_off00002fd5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FD5	22484 bytes
SHA-256: `f9ad471b54b485eaea273d881aef7716daeb4a778f3cfcdb8b55ea3cdf970a2a`
`font_01_sfnt_off0000622c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x622C	19240 bytes
SHA-256: `4bffdf7e2c815eb94b401589d046dde70dc2cf8c75320d804a2bacf4e40cefb9`

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