PDF malware analysis — malicious · 6af4ae4f8a916cc1

MALICIOUS

PDF

42.9 KB Created: 2021-05-14 12:32:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 476a0656216dc30c1b29741d9c40f8dc SHA-1: 917b41a18a44bfea88ab4524a202281fc35e5b5b SHA-256: 6af4ae4f8a916cc1e49160c71e5d4890717a1efafc74fd5d3cf049d6e895d06a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free in-game currency, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to potentially harmful content.

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/coin-master-free-spin-link-twitter-game-hack PDF link annotation
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/i-want-robux_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-with-no-verification_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
`stream_003_off000049ff.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49FF	25592 bytes
SHA-256: `12d1746af0355d55048df10d3747f879f35554e3a76814ec1e57f8a2c05381de`
`font_01_sfnt_off00008596.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8596	18220 bytes
SHA-256: `b594fc670d790d0d446ae286633f4f60e484476280493cebd05396ea33631896`

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