PDF malware analysis — malicious · 85e58d6bd1ca1021

MALICIOUS

PDF

44.0 KB Created: 2021-05-16 03:01:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: d12d5cdcdb22767eaf9ca687b3d98ef4 SHA-1: 1534e0f407058a5423e0bae8246dbd0cf9cd6b3f SHA-256: 85e58d6bd1ca102167323016b3925ebbdf5a662d1522464c0bbd35b41d98a333

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 0.9969

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/how-to-get-free-robux-without-doing-anything-2021-game-hack PDF link annotation
- https://quatangphongthuy.vn/upload/UploadFiles/files/dailyrobux_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/how-to-use-redstone_GM479516143.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-robux-games_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
- https://quatangphongthuy.vn/upload/UploadFiles/files/coin-master-free-spins-reddit_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_off00004b27.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B27	25292 bytes
SHA-256: `e2f52b1c1a280093a5e435bbdc87554ff25e037ac95d1f2dbac693802d619a26`
`font_01_sfnt_off000084fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84FA	19804 bytes
SHA-256: `7de61e10f8b36a8651a25a8843179e8b1ecc4bebcf46d2f81f98618caa29dc1a`

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