Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e4c6fbe743644d…

MALICIOUS

PDF

45.3 KB Created: 2021-06-11 08:36:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 25f7a081cdc4694f8ac381679e0c7337 SHA-1: 6be530677c9fcdf0e5f554e77c6063579527f9e5 SHA-256: e9e4c6fbe743644dae8841039fae65cea8231f15968b92f1d2e677df7469d210
150 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into interacting with embedded links. It also exhibits characteristics of a link farm, with numerous external PDF links pointing to various gaming-related topics. The ML classifier strongly flagged this PDF as malicious, suggesting it's designed to redirect users to potentially harmful content or facilitate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.tw/app/431946152/como-ser-hacker-en-roblox-con-poderes-game-hack
    • https://gaushalango.com/uploaded_files/userfiles/files/free-spin-coin-master-online_GM406889139.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/roblox-g_GM431946152.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/roblox-free-robux-codes_GM431946152.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/can-i-get-free-robux_GM431946152.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-34-5-hack_GM406889139.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/free-coins-coin-master-link-2021_GM406889139.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/free-robux-rbx-place-rewards_GM431946152.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/adopt-me-roblox-hacks_GM431946152.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-offsale-stuff-on-roblox-free_GM431946152.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/roblox-character-free_GM431946152.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/roblox-robux-hack-generator_GM431946152.pdf
    • https://gaushalango.com/uploaded_files/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005484.bin
8d105c23ec42ce92540f4ea519ac0ccd2a3cc870521e5d06443ba5bf4a8bb7fd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5484 25208 bytes
font_01_sfnt_off00008cfc.bin
8a751d4519df6d313babc696da11cfe73b08fbabfe2206db5b7b3c3b26906c94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFC 18768 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.