Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab027577788cda7…

MALICIOUS

PDF

32.3 KB Created: 2021-07-05 09:10:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e294643afda7753fde7dda177fab0643 SHA-1: c8fb6b7a071ba72073a8acdac6dd7e0736d77129 SHA-256: 2ab027577788cda7205ae7c6896f42c51b1a7a0104b4d333c1c587dfa789d47a
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URLs, including one directly referenced in the document body, that lead to sites offering 'free followers' or 'hacks'. The ML classifier strongly flagged this PDF as malicious, and the presence of JavaScript suggests it may be used to download and execute a second-stage payload. The document's content and structure are consistent with a lure for a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.tw/app/835599320/how-to-get-free-followers-on-tiktok-game-hack
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/get-free-cards-for-coin-master_GM406889139.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-followers-for-tiktok_GM835599320.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-spins-and-coins-coin-master-links_GM406889139.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-logo-youtube-for-roblox_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/robux-live-stream-hack_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/what-games-give-you-robux_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/roblox-free-amry-shirt_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/how-to-free-robux-roblox-2021_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/robux-free-online_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/roblox-hacks-winrar_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/how-to-hack-someones-account-roblox-2021_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-robux-on-phone_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/minecraft-116-1-download_GM479516143.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-apk-hack-32_GM406889139.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/robux-hack-descagar_GM431946152.pdf
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-robux-just-by-watching-videos_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c16.bin
64feb9a4a513a0f9e5accfb469c5152ad772bacc01a49d7591d6cc74da026f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C16 21832 bytes
font_01_sfnt_off00005c2b.bin
f9d2c1390f8e20d2e9bf1cfb0a2778eabda17a7a6df14e300d2c69cf535d7ea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2B 18208 bytes

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