PDF malware analysis — malicious · 555bac99786fe94e

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 08:36:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 7596f5327d997729186dc0bc2923220a SHA-1: 25ecd4d87e090b6dc399cf10f6e72d11a88f3a5d SHA-256: 555bac99786fe94ed0d02c9c471a0f3bd37781b6456d8c45ef2ee4386e2c627e

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/free-spins-coin-master-links-twitter-game-hack PDF link annotation
- 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/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/free-hair-roblox_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-support_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/free-robux-only-username_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
- https://maths-pdf.fr/ckfinder/userfiles/files/master-8-ball-pool-free-coins_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_003_off00004bd1.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BD1	25332 bytes
SHA-256: `bbeb60f3ebc249f6b550303fde443aa363519672a91a138502759781b3f7b58a`
`font_01_sfnt_off0000853a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x853A	18220 bytes
SHA-256: `a8042c8be0da33bfea773b5dc12ed23934315e0f49b2af9c9120623c9b8fda06`

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