PDF malware analysis — malicious · aec3b789251aa79f

MALICIOUS

PDF

42.8 KB Created: 2021-05-10 22:33:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 61c512b1d564ee129f674c5ebee93830 SHA-1: 2686eadaf18bd2c104ef449ba6b1d2c5752a7b6c SHA-256: aec3b789251aa79f51cb9d44feda5bebdf1403655c32bbd9974995ee76255bc6

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering game hacks and free spins, a common lure for phishing and malware distribution. The ML classifier strongly indicated maliciousness, and the presence of multiple game-related URLs reinforces the social engineering pretext. No scripts were extracted, but the primary attack pattern involves directing the user to a malicious external resource.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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/406889139/get-free-spins-for-coin-master-game-hack PDF link annotation
- https://www.knjigebuducnosti.com/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/free-robux-download_GM431946152.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/roebucks-on-roblox_GM431946152.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/roblox-robux_GM431946152.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
- https://www.knjigebuducnosti.com/files/coin-master-free-spins-16-04-19_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_off00004936.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4936	26460 bytes
SHA-256: `00d115f06a0d99cc4ed48e469f16544e55f0154dddea71134f7ba52563eae0f1`
`font_01_sfnt_off00008639.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8639	17884 bytes
SHA-256: `9bf67b2ee87cdcf37b0aaa2d40e70a5836dac1840b9be614bff5a3f1a0edfaa7`

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