Malicious PDF — malware analysis report

Static analysis result for SHA-256 3616d3b6326ff86a…

MALICIOUS

PDF

44.6 KB Created: 2021-05-12 22:48:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b237ef80278a451530d570ca7a283666 SHA-1: 002268d98e8ec35a18e835be8ed919352d7b08cd SHA-256: 3616d3b6326ff86ad265a1edc84dd2fd5c1830f7c95fe871b595672cc6394353
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to attract users searching for game hacks or in-game currency. The document body and extracted URLs indicate a lure related to obtaining free Robux or other game exploits. While no scripts were explicitly extracted, the PDF structure and extensive link farm are indicative of a malicious campaign aiming to redirect users to potentially harmful content or downloads.

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/431946152/how-to-get-free-roebucks-in-roblox-game-hack
    • https://fridaytravelnepal.com/userfiles/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdf
    • https://fridaytravelnepal.com/userfiles/files/coin-master-attack-hack-apk_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/scaffold-minecraft-hack_GM479516143.pdf
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/easypoints-gg-roblox_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/free-spin-link-coin-master_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/free-roblox-outfits-2021_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/how-do-you-earn-robux_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-cheats_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/clean-master-hack-coins_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-tuts_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/optifine-mcpe_GM479516143.pdf
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-in-app-purchases_GM406889139.pdf
    • https://fridaytravelnepal.com/userfiles/files/free-robux-giveaway-live_GM431946152.pdf
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a8d.bin
a0477e717c8cd01e0bcbac33ce97d6cd842f6b3f491367cd12562937594a3a17		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8D 29864 bytes
font_01_sfnt_off00008b41.bin
6a418ba74ae5328d563bd5a35238a9b9c08fdc9000a9cbda284a157467e29bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B41 18524 bytes

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