PDF malware analysis — malicious · f975e1c81ff5fb91

MALICIOUS

PDF

48.6 KB Created: 2021-06-02 23:03:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 0e30d34541b486e30966fef018f28d1c SHA-1: a9b13481f31b958832e6e222b3b31d537f5b1a88 SHA-256: f975e1c81ff5fb912bbdafb6c6d4462bd7bf06a0c66a3d803bb10c454c5e04db

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a lure for a 'free generator / game hack' which links to a malicious URL. The document body, though heavily obfuscated, contains references to similar lures and the primary malicious URL. The presence of embedded links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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/431946152/free-working-no-human-verification-roblox-card-game-hack PDF link annotation
- https://maths-pdf.fr/ckfinder/userfiles/files/tiktok-free-100-views_GM835599320.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/www-robux_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-free-link-app_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
- http://wolfzscriptsIn 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_004_off000050cd.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x50CD	25824 bytes
SHA-256: `dbaac567feee8aa542e661da2995d1a4bdf0c08dfd767a035f34b03b6b4ae242`
`font_01_sfnt_off00008d3f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D3F	2832 bytes
SHA-256: `77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2`
`font_02_sfnt_off000096f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96F0	19764 bytes
SHA-256: `f2567718a4e3df2ebfefde34363f3973f8e779c0cfa105f529e9600b54f4e959`

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