Malicious PDF — malware analysis report

Static analysis result for SHA-256 427ee8b9af9f6c1b…

MALICIOUS

PDF

43.2 KB Created: 2021-05-15 03:41:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a608e5a8a3580b9fc13c232ce13c5990 SHA-1: 53aa3a4b1d65ee496ce603e9fa8b86488442cdf3 SHA-256: 427ee8b9af9f6c1bc8ef3d4e5ff532217cfd600861a837213e2de9648621276b
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a "download" button to trick the user into clicking a malicious link. The embedded URL and numerous other URLs point to sites offering game hacks, suggesting a social engineering lure to download potentially unwanted or malicious software. The ML classifier strongly flagged this PDF as malicious.

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/coin-master-hack-game-game-hack PDF link annotation
    • https://traveljogja.net/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000491d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491D 29512 bytes
SHA-256: 290a0bcfbe70fc348daa920eaadbab84e1b67b17d666e86c2752c06829f9a160
font_01_sfnt_off0000875d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875D 17976 bytes
SHA-256: a10cba9c8785de960fed0da4a3eab1918984567c97134b904b56a350c269fc22

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