PDF malware analysis — malicious · 813b6cd15bf6ae7e

MALICIOUS

PDF

43.5 KB Created: 2021-04-23 16:46:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: f3d8c390855b58e7355d98e6c98c916c SHA-1: 8db254af02a1459c9727aa7be62800addb061fe1 SHA-256: 813b6cd15bf6ae7e18e8f1bbc68d8e6ab8de199e3637fba0d26910e057735ee0

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 0.9868

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://netsecure.top/app/431946152/can-u-make-a-shirt-in-roblox-for-free-game-hack PDF link annotation
- https://balibanknews.com/new/public/ckfinder/userfiles/files/how-to-get-a-shoulder-pet-on-roblox-for-free.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-dead-winter-infinite-hack.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-being-hacked.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-download-free-coins-apk.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-promo-codes-robux-hack.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/hack-roblox-blob-simulator.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-exotic-hack-roblox-assanis.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-immortal-hack.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-robux-account-not-used.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/i-want-robux-for-free.pdfIn 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
`font_00_sfnt_off000041fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x41FB	25216 bytes
SHA-256: `f07ae84cdacf741f2eafe178bea3aadf5b8f599116176b5320255707f4c557da`
`font_01_sfnt_off00007a98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A98	3312 bytes
SHA-256: `40bd8eebcb3a0d68a8646f1930e84f30a44bfa48525263c6c528f0bc1e9c1677`
`font_02_sfnt_off000085e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85E8	19120 bytes
SHA-256: `4295ac836012f7c8f0ad262e551f6448da146b583804b0c6fa8ce37b1eb1a8c1`

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