Malicious PDF — malware analysis report

Static analysis result for SHA-256 2843a3e8a6df4af7…

MALICIOUS

PDF

43.9 KB Created: 2021-05-17 18:01:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4376863de1fdfa7904969a47c43f0558 SHA-1: 1c57fc3cdea9a7385385582c75fc24bf86163f9b SHA-256: 2843a3e8a6df4af7201bf0c6de6a3dea3bfdb8c552c1829682215670162b17f1
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or verification prompt to trick users into clicking a malicious link. The primary lure is a "Free Coin Master Hack" which directs users to a suspicious URL. The presence of numerous other PDF links suggests a broader campaign distributing similar lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-coin-master-hack-no-verification-game-hack
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-no-email_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-programmers_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/can-u-get-free-robux_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-rewards-free-spins_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-dominus-free_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-cheats_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-hack-ios_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/collect-free-spin-linms-coin-master_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-toy-codes-free_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-coins-free_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/what-do-points-do-in-roblox_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/earn-free-robux_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-fb_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-ways-to-get-robux_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/where-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005126.bin
fd10ab8c869f19d0e1eac019cea4de0e2b968e19ef348793bdfe578362916fb2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5126 25160 bytes
font_01_sfnt_off00008a2f.bin
22df04c4dacbc852f4ecaf83adb1826ed6293343c5161e377e09b669fc2092ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2F 18016 bytes

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