PDF malware analysis — malicious · bf2ddf17fe0871c7

MALICIOUS

PDF

41.2 KB Created: 2021-05-16 10:33:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 0ff6f8daf9897633e0f3778045ce8e9c SHA-1: 3b24647a4de5f8d6a0ac209a8112a57e6812adbe SHA-256: bf2ddf17fe0871c7ce605c4d424d1be63990a3aab19d0e004ff79c9ad2d22ece

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/earn-free-spins-coin-master-game-hack PDF link annotation
- http://achauco.vn/public/upload/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-roblox-codes_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-money-links-coin-master_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/minecraft-education-free_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-blogspot_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/freecoins_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/is-coin-master-free_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/roblox-executor-free_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-minecraft-for-free-ios_GM479516143.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_003_off0000472b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x472B	24592 bytes
SHA-256: `201e21df867b2b2657cddc8b600b5ac9f77a61111585e104438a48252b5124ec`
`font_01_sfnt_off00007ff3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7FF3	17884 bytes
SHA-256: `ab4497ad502ac8933d6a85a74dbdccf2fe2caf558913bb77e02944b83dc00fb1`

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