Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2009cf907f15b8e…

MALICIOUS

PDF

45.9 KB Created: 2021-05-16 03:38:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aef6091afd16ea1b725320494a1a07b1 SHA-1: c68d11dafe941d31240122e1eb848c3d9fa4347f SHA-256: a2009cf907f15b8eb731fcd31544b774880dcafbf08450ab0f163c761870ec99
142 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and download lure to trick users into downloading a malicious file, likely related to game exploits or cheats. The presence of multiple URLs pointing to similar content suggests a phishing campaign aimed at distributing malware. No scripts were extracted, but the overall pattern indicates a social engineering attempt to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.xyz/app/431946152/free-robux-no-human-verification-or-survey-or-download-2021-game-hack PDF link annotation
    • https://www.cosmosdawn.net/images/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://cosmosdawn.net/images/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://cosmosdawn.net/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://cosmosdawn.net/images/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-coins_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://cosmosdawn.net/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/coin-master-hack-progamers_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_003_off00004c68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C68 28188 bytes
SHA-256: 9885503ee607842db0aaad7969015bf2cae68fd02a35ed6ebfb8a47e9cbcc083
font_01_sfnt_off00008b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B87 20136 bytes
SHA-256: 66e5e50e12f5eb49621ab9bcd6ab85026409d616512a452c1eb3339dd9867554

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