PDF malware analysis — malicious · 3d2f0c848459e28f

MALICIOUS

PDF

34.6 KB Created: 2021-07-02 01:03:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 8d51df2b3fee018e0d00e6738c062556 SHA-1: ab094125394de91fd87b6c5ddffa22c5e7d1429b SHA-256: 3d2f0c848459e28f9ef861b7ebfe333b52d643ad21087bf96359c61952683337

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.co/app/431946152/get-free-robux-if-you-finsh-ths-obby-game-hack PDF link annotation
- https://www.serraw.com/uploaded_files/userfiles/files/roblox-bubbly-animation-free_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/free-roblox-shirt-template-nurse_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/hack-mad-city-roblox_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/hack-roblox-with-lucky-patcher_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/hack-web-for-roblox_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/free-roblox-in-game-hacks-download_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/roblox-free-robux-no-waiting_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/how-to-noclip-through-walls-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/roblox-jailbreak-play-for-free_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/cheats-for-roblox-mobile_GM431946152.pdfIn PDF document text
- https://www.serraw.com/uploaded_files/userfiles/files/is-tiktok-free-to-use_GM835599320.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_off0000302e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x302E	22072 bytes
SHA-256: `120b4741ae172c3e101bf09e3d9d49b8e3fe10ce947405570450c9b08877e206`
`font_01_sfnt_off000060fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60FA	19448 bytes
SHA-256: `661f610d7d30a470836059d5cb5cda91164741b25fc3a1d75870f48309f14033`

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