PDF malware analysis — malicious · ef729e1f8063ed27

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 22:10:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 2f8fb9e54a836bbab1dc8dd3c270395f SHA-1: bb9851eadc46564b1e67421eaeb5bbb6abfcbfef SHA-256: ef729e1f8063ed279daaff0d06e6e60d0886523bf30a5ea5edf39d21a7dc28c8

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 0.9980

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.tw/app/431946152/how-to-hack-in-roblox-prison-life-game-hack PDF link annotation
- https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/oprewards-points-generator_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/robloxcom-how-to-get-free-robux-only-today-adverts_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/assassin-2-hack-roblox_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/kupcake-roblox-hack_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/roblox-cb-ro-hack-script_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/legenendary-roblox-hacks_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/case-clicker-cheats-roblox-2021_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/roblox-rewards-site_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/free-hacks-for-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
- https://rivnepost.rv.ua/ckfinder/userfiles/files/how-to-cheat-is-guess-the-song-roblox_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_off00002f9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F9A	22860 bytes
SHA-256: `c2b444e4db8c64c43725b891210de0f686ce12fe1ba4f55505d26e6909359b10`
`font_01_sfnt_off000062a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x62A6	19092 bytes
SHA-256: `a35ded4b1533c5edb4693f0e9c1cbeeca8a6631724cd2872fdcfe7178e5551db`

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