Malicious PDF — malware analysis report

Static analysis result for SHA-256 581ca8fa6a3deca9…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 02:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8694a16370c53649e839d7d6f09dbd1e SHA-1: d422a4f19ba77f3c1a0dcf53f48af0962ae4969a SHA-256: 581ca8fa6a3deca91f52624910e69c857714146481764356b2a4fd2eb1647b20
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document presents itself as a free download for game-related content, likely to trick users into downloading a malicious payload. It displays a fake CAPTCHA or human verification prompt, a common social engineering tactic to encourage user interaction. The embedded URL points to a suspicious executable, suggesting the document's primary purpose is to facilitate a download of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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
  • 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/free-admin-on-roblox-pastebin-game-hack PDF link annotation
    • https://bartonprivate.com.au/sites/default/files/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/what-is-robux_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/roblox-roghoul-legendary-hack_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/jak-zrobici-za-free-postaci-w-roblox_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/robux-hack-discord_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
font_00_sfnt_off0000300b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300B 21856 bytes
SHA-256: 960aaa6ed44b305675cbecd9cd920faef391d0981697678837ab548803b01b25
font_01_sfnt_off00006055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6055 19460 bytes
SHA-256: 62e3b46d9c8ec6183f3ccdd5004814fd5cddd6ea3aba883b1103c5f4bdbcbba8

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