PDF malware analysis — malicious · 307dc3656db86d7f

MALICIOUS

PDF

45.2 KB Created: 2021-05-15 13:15:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 3721c6250c50a6e7866748ddb85003e5 SHA-1: 4035328290fca342a7978b4895b4fec7f1b31df3 SHA-256: 307dc3656db86d7fa783f9e614dce0ca99bd5a84c7608a294101edd371439241

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a 'free generator / game hack' redirector, strongly suggesting a lure for users seeking cheats or in-game currency. The primary URL, 'https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-game-hack', is likely the destination for this social engineering attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9551

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-daily-free-spins-game-hack PDF link annotation
- https://steelfurniture.vn/public/upload/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/free-robux-app_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/free-robux-offers_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/earn-robux-now_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/coin-master-twitter_GM406889139.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
- https://steelfurniture.vn/public/upload/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off000048fc.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x48FC	25768 bytes
SHA-256: `ed0716c79893ae96ebd9b27c8dcf73970444b1e094004306a1aabcd0b49ebdb0`
`font_01_sfnt_off0000843f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x843F	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008e29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E29	18308 bytes
SHA-256: `e42bde5f0ce420544e36e42831a39ceefa2103814e02a0c87b67b282abd28734`

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