PDF malware analysis — malicious · b39397b875d1517c

MALICIOUS

PDF

35.4 KB Created: 2021-06-20 03:00:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: d24691f0f7a9709e35476c8d8765d387 SHA-1: 3fe6f3b242e08ef81959665bf1910560d2bb61b0 SHA-256: b39397b875d1517c00331a082ad736af1d05941d39dc7b96a9e2666d0d7a443c

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to the URL http://netcdn.co/app/431946152/free-robux-gfames-that-dont-take-password-game-hack. This URL is associated with a game hack redirector, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/free-robux-gfames-that-dont-take-password-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-do-you-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-pics_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-do-you-get-free-robux-on-roblox-on-ipad_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-coin-master-links_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-on-android-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/jailbreak-script_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_off00003122.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3122	22172 bytes
SHA-256: `fe054fad973bc19b5f6fce3e38febf6ca4fb3c70dc5a2dfab3425cdbb7333463`
`font_01_sfnt_off0000626b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x626B	20076 bytes
SHA-256: `e0b5c1dad8b383f0fe2d46e8756833aac7ac3f989907d4a3ca965a5048d81213`

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