PDF malware analysis — malicious · 37c9595328f288f1

MALICIOUS

PDF

47.4 KB Created: 2021-05-13 16:19:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: ca5d61b7c3532d1644d490e86e6adb87 SHA-1: d3f0085736dd76f64b2594aeb95b14046b40c167 SHA-256: 37c9595328f288f1efd10b2ed273182ef3900888fd47d73b1052653d81a41108

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to pages offering free Robux, Minecraft packs, or Coin Master spins, indicating a lure for potentially malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the lures suggest an attempt to redirect users to sites that may host malware or engage in phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

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/431946152/www-free-robux-game-hack
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-minecraft-texture-packs_GM479516143.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-links-to-coin-master_GM406889139.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-coin-master-spins-daily_GM406889139.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-robux-no-verification_GM431946152.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/coin-master-hack-2021-without-verification_GM406889139.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/apps-to-get-free-robux_GM431946152.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/roblox-2021-hack_GM431946152.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/how-to-get-free-minecraft-skins_GM479516143.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/coin-master-hack-ios-app_GM406889139.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-robux-obby_GM431946152.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/roblox-admin-hack_GM431946152.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/coin-master-game-hunters-club_GM406889139.pdf
- https://www.alloywheels.in/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004b69.bin` `47aeffe6d4b1d2ec7e57a09e33c398ad38064c2b1134c409b026fa4f09e541bb`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B69	26088 bytes
`font_01_sfnt_off0000865f.bin` `fa93de321190668b294ff46149e4b98ac349b4fd022dcee9ecd964f7f59f3f9a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x865F	6768 bytes
`font_02_sfnt_off0000969e.bin` `3afa3067d1f3c9d8d4e5028784d7d2a7352a3b977a914758f486701e4d265e0a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x969E	18376 bytes

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