Malicious PDF — malware analysis report

Static analysis result for SHA-256 103c51ce822f60a3…

MALICIOUS

PDF

46.9 KB Created: 2021-05-31 09:54:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 09aa27b24f3652a2cd2fe80e205bb385 SHA-1: 7e611a4a4288ee839fd4ffa207199010a2e731af SHA-256: 103c51ce822f60a3f8efed7145e7efe01eca19de0181ecdbcb70d880be4510da
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA lure to trick the user into interacting with a link, which is a common social engineering tactic. The embedded URL points to a domain associated with malicious content, suggesting the document is designed to redirect users to a site that likely hosts further malicious content or exploits. No scripts were extracted, but the presence of a fake CAPTCHA and external links indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

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/431946152/how-to-hack-dorm-life-on-roblox-game-hack PDF link annotation
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://forensicsinstitute.org/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today-instagram_GM406889139.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_004_off000056de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56DE 25704 bytes
SHA-256: 6f0d2df5bde71578e688d72acc4b94c46957622c0c0ab3f3373b741845516f5c
font_01_sfnt_off00009326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9326 18896 bytes
SHA-256: a3b9c368bea9036f104194c4c0f33bc7ec259b73b8354231db5c7c682c23d6bc

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