PDF malware analysis — malicious · bf87dd3754e27d14

MALICIOUS

PDF

45.8 KB Created: 2021-05-17 22:06:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: e5710fe4747dbb80ebe365bbf832530b SHA-1: 185c4260eca3e29de2e7ef230363a4356e1cd8fd SHA-256: bf87dd3754e27d14f212de7caa43dd127321b5fb3347250bac83921924c3b12d

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 0.9432

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/479516143/how-to-play-minecraft-for-free-on-computer-game-hack PDF link annotation
- https://www.toyogas.com.tw/upload/files/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/robux-free-online_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/install-coin-master_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.toyogas.com.tw/upload/files/coin-master-free-shield_GM406889139.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
`stream_003_off00004d51.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D51	24880 bytes
SHA-256: `8d9c35ec096130736092b5fc6b6a3b6ea22b22f9e60c390ad6cc70e6af41663c`
`font_01_sfnt_off00008588.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8588	2820 bytes
SHA-256: `972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714`
`font_02_sfnt_off00008f28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F28	18856 bytes
SHA-256: `0bf6c0bd76ed5d1c58559c1f95d1c50dc4b30ca3d794beb61030886a89b2d7ce`

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