PDF malware analysis — malicious · bf5544fd5f5a01e2

MALICIOUS

PDF

47.3 KB Created: 2021-06-11 04:37:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: da5644c4c8587e9a1f612487faf3c97e SHA-1: 175d2bc7cb54c4771f06011f3b6cbca37c8e4f9d SHA-256: bf5544fd5f5a01e2217f98ce03d562929430cb1f7957bbcab84d673d1be53310

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 0.9832

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.tw/app/431946152/roblox-cheat-codes-jailbreak-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-2021-ipad_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/google-roblox-games_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-cheat-at-roblox_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-34-5-hack_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/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-many-villages-are-in-coin-master_GM406889139.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/free-robux-for-kids-no-verification_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_004_off00005430.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5430	27644 bytes
SHA-256: `db492ee4009f2f6dfdcc4d1e071bccd6d4a080fddd173cb5136c99e702b464d8`
`font_01_sfnt_off0000947f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x947F	18912 bytes
SHA-256: `392ef4daf85952276dca4a91f1bbc6c05bbb89644edb0aafcd1fdb00c0204e58`

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