PDF malware analysis — malicious · f54d88e53ef66662

MALICIOUS

PDF

35.4 KB Created: 2021-06-25 15:50:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: a47b3d3c7914ee9701fda5f96f4ed464 SHA-1: 96975734f94de270ef82f059a7d1a7312cb3ff28 SHA-256: f54d88e53ef6666264e3981b8366d305bca81827e996d4fc3ba5fe737a5cbada

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/free-spiderman-outfit-on-roblox-game-hack PDF link annotation
- https://www.cow-style.com.tw/upload/files/roblox-comroblox_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/www-roblox-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/cheat-extension-google-pour-cheat-roblox_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/fan-page-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-free-robux-trade-m-programme-promocom_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-lumber-simulator-2-hack-script_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-get-free-robux-with-inspect-element-2021_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-hack-roblox-using-dll_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-do-you-hack-for-cases-in-cbro-roblox_GM431946152.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_off00003195.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3195	22504 bytes
SHA-256: `0d728041a78bc605885e95dda1346bcadcf36fea1f0b625c7eab023aac659c92`
`font_01_sfnt_off000063db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63DB	19624 bytes
SHA-256: `69cbb92e088753eac9cd8508baa11af891c75c4ef01ecba7aca025751bab2068`

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