PDF malware analysis — malicious · a3553a88e3defccc

MALICIOUS

PDF

35.5 KB Created: 2021-07-06 07:04:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 208c2d55b18d58d41f68089f0bdf77d1 SHA-1: d8822c997a3849a23aa08518b46ecbd53a65d12f SHA-256: a3553a88e3defccce9e1a3d4e0929cd290490710364f654e1fcb17c6a8d76542

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/free-coin-master-hack-no-verification-game-hack PDF link annotation
- https://www.dotnotion.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/roblox-card-codes-free-2021_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/free-robux-copy-pasta_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/how-to-get-free-stuff-in-roblox-july-2021_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/drilling-simulator-hack-roblox_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/how-to-get-gamepasses-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/free-robux-la-plus-facile_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/tiktok-free-followers-and-likes_GM835599320.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/pubg-uc-free-online_GM1330123889.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/roblox-redeem-robux_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/change-you-roblox-name-for-free_GM431946152.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
- https://www.dotnotion.com/uploaded_files/userfiles/files/minecraft-pe-hacks_GM479516143.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_off000033fd.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x33FD	23232 bytes
SHA-256: `b3149e6a015269d5cd60d1066093276f08053389f40b124009f427ad8a2bc375`
`font_01_sfnt_off0000684a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x684A	18300 bytes
SHA-256: `cb2b7cb0059af51db9ca07fd0e0130e31ebff2afe995e407a7cf27ef7bb28351`

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