Malicious PDF — malware analysis report

Static analysis result for SHA-256 117c7065ef9b060f…

MALICIOUS

PDF

49.4 KB Created: 2021-06-03 06:11:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7cd7aae766c2f07d491dd4ff556ee998 SHA-1: e7a0d4dcb17e1bb5508e0267ba9f2c7dd39eb56d SHA-256: 117c7065ef9b060ffb8ebd8e03f4fe61e29dc4ae90325499e8eda0827ea079f3
122 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to deceive users into clicking a link. The link, https://netcdn.online/app/431946152/roblox-imagine-game-hack, leads to a game hack generator, which is a common pretext for delivering malware. The ML classifier strongly supports the malicious nature of this PDF. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game cheats to facilitate a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.online/app/431946152/roblox-imagine-game-hack PDF link annotation
    • http://www.mondecasa.com/Public/upload/editorfiles/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/blocky-world-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005457.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5457 27180 bytes
SHA-256: 5a56e31e76d1ab3e117c78b83e26d5f24875a2874a849dd3a9672b082840e502
font_01_sfnt_off00009304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9304 3016 bytes
SHA-256: 4c3e2db5174821787a4569c9da4979555510caebd15fb9cea35573c139e242bd
font_02_sfnt_off00009d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D68 18680 bytes
SHA-256: a55166a074bb895a998fc6ba58d68b2da5fbde3090d9bd557b4756abe288ee64

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