Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d52d32c644d4920…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 03:58:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7dd90e73aad0e0ddb293c2df69c45569 SHA-1: 641081fe44e6f94817a40924f568942514c4f48b SHA-256: 6d52d32c644d4920a1f087e0ebfd39c7a2b280e6de8e8adfa6601502e83b1b26
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to websites offering game hacks and virtual currency, such as 'free robux' and 'coin master hack'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly flagged this PDF as malicious. The document body explicitly mentions 'Click 100 Times To Get Free Robux', reinforcing the lure to malicious sites.

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 http://netcdn.co/app/431946152/click-100-times-to-get-free-robux-game-hack
    • http://elitesoftsolutions.com/images/free-robux-instantly_GM431946152.pdf
    • http://elitesoftsolutions.com/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://elitesoftsolutions.com/images/hack-game-toool-for-roblox_GM431946152.pdf
    • http://elitesoftsolutions.com/images/free-roblox-hack-us_GM431946152.pdf
    • http://elitesoftsolutions.com/images/hack-para-que-no-te-toqque-en-roblox_GM431946152.pdf
    • http://elitesoftsolutions.com/images/roblox-gift-card-for-free_GM431946152.pdf
    • http://elitesoftsolutions.com/images/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://elitesoftsolutions.com/images/free-spin-in-coin-master_GM406889139.pdf
    • http://elitesoftsolutions.com/images/coin-master-unlimited-spin-hack-apk_GM406889139.pdf
    • http://elitesoftsolutions.com/images/how-to-change-your-username-on-roblox-for-free_GM431946152.pdf
    • http://elitesoftsolutions.com/images/iiwoodlandheadphones-trife-hacker-roblox_GM431946152.pdf
    • http://elitesoftsolutions.com/images/dino-sim-roblox-how-to-get-free-dinosaurs_GM431946152.pdf
    • http://elitesoftsolutions.com/images/free-girl-hair-roblox_GM431946152.pdf
    • http://elitesoftsolutions.com/images/i-will-hack-everyone-on-roblox_GM431946152.pdf
    • http://elitesoftsolutions.com/images/free-robux-team-panda_GM431946152.pdf
    • http://elitesoftsolutions.com/images/free-robux-com-roblox_GM431946152.pdf
    • http://elitesoftsolutions.com/images/roblox-avatar-the-last-airbender-cheats_GM431946152.pdf
    • http://elitesoftsolutions.com/images/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://elitesoftsolutions.com/images/robux-party-com-four-robux-free_GM431946152.pdf
    • http://elitesoftsolutions.com/images/tiktok-followers-free-2021_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eba.bin
39a16e1332bfa4ea873399be4056c65d6b4c23a3b4dea3baf26f8063a3698411		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBA 22032 bytes
font_01_sfnt_off00005f7b.bin
69fa892a92b3ba41b35eb87ce9b14bd9404ec8a18baf1809783ee12bfa32deba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7B 19720 bytes

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