PDF malware analysis — malicious · b77bc08a7ae7b636

MALICIOUS

PDF

37.6 KB Created: 2021-07-04 05:37:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: b1e7171fd140d7e3349abe250d407a48 SHA-1: d96763981965533e0dbb328ae7d89402973522ab SHA-256: b77bc08a7ae7b636eeb2d0e366131f31024b5c35f499c8cdb0938dc543eb7484

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/406889139/coin-master-free-cards-link-2021-today-game-hack PDF link annotation
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/2021-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/robux-free-deniz_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/how-to-get-a-free-face-on-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/how-to-hack-thru-walls-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/where-to-find-free-items-on-roblox_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/how-to-hack-your-friends-roblox-account-2021_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/comment-hacks-roblox-skywars_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/checking-free-models-on-roblox_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/get-free-robux-script_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/7-year-old-roblox_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/roblox-admin-house-hack_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
- http://www.behikeyacht.com/new/public/ckfinder/userfiles/files/free-spins-link-in-coin-master-2021_GM406889139.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_002_off0000399d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x399D	23516 bytes
SHA-256: `b1bc3d4a7d456a6bb1ce3a949097915d35515d09adc06d7779d61ad1e247c8e7`
`font_01_sfnt_off00006e79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E79	18924 bytes
SHA-256: `4325d22604c985801318a09856abb239b71478aaf8f7ce5bde155a72b560a462`

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