PDF malware analysis — malicious · 1a2523d65b96fabb

MALICIOUS

PDF

44.8 KB Created: 2021-05-16 03:02:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 469c1905be7aac7645f963b1387473ad SHA-1: 6a3c37bf9ea7ad4e1d2a1c4492ea6f17b6d1a7dd SHA-256: 1a2523d65b96fabbcd729bd78cef19db09a2abb6ac61da1448d1406aa0be145d

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are related to game hacks and cheats for popular games like Coin Master and Roblox. The presence of a link farm heuristic and the ML classifier flagging this PDF as malicious strongly suggest a phishing or scam attempt. The document body, though partially corrupted, contains URLs that likely lead to malicious content or further download stages.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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/free-spins-from-coin-master-game-hack
- https://www.ucc-today.com/uploads/files/files/coinmaster-fan-page_GM406889139.pdf
- https://www.ucc-today.com/uploads/files/files/how-can-i-get-robux_GM431946152.pdf
- https://www.ucc-today.com/uploads/files/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
- https://www.ucc-today.com/uploads/files/files/coin-master-hack-2021_GM406889139.pdf
- https://www.ucc-today.com/uploads/files/files/hack-coin-master-android-game_GM406889139.pdf
- https://www.ucc-today.com/uploads/files/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
- https://www.ucc-today.com/uploads/files/files/free-robux-no-verify-2021_GM431946152.pdf
- https://www.ucc-today.com/uploads/files/files/free-spins-on-coin-master-2021_GM406889139.pdf
- https://www.ucc-today.com/uploads/files/files/robux-match_GM431946152.pdf
- https://www.ucc-today.com/uploads/files/files/coin-master-email-free-spins_GM406889139.pdf
- https://www.ucc-today.com/uploads/files/files/coin-master-free-cards-link-2021_GM406889139.pdf
- https://www.ucc-today.com/uploads/files/files/daily-coin-master-free-spin-apk_GM406889139.pdf
- https://www.ucc-today.com/uploads/files/files/rewards-roblox-com_GM431946152.pdf
- https://www.ucc-today.com/uploads/files/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
- https://www.ucc-today.com/uploads/files/files/coin-master-free-spins-that-really_GM406889139.pdf
- https://www.ucc-today.com/uploads/files/files/robux-generator-without-human-verification-2021_GM431946152.pdf
- https://www.ucc-today.com/uploads/files/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdf
- https://www.ucc-today.com/uploads/files/files/free-robux-without-human-verification-2021_GM431946152.pdf
- https://www.ucc-today.com/uploads/files/files/50-000-free-spins-coin-master_GM406889139.pdf
- https://www.ucc-today.com/uploads/files/files/how-to-hack-someones-account-on-roblox_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004cc7.bin` `ace145c43b06b03e91c53285d8b8f6424c997c7265f726d1562b869176814738`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4CC7	29176 bytes
`font_01_sfnt_off00008d5d.bin` `a8179ab01d9f651dd6fb5ce3364ead5561884d8b40fe8a62eaf26fde05d0c646`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D5D	18148 bytes

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