Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f584d4463b981d…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 06:30:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2bd971115637a4cd3dece8d65dc0cb85 SHA-1: 7e6c597e8b767baf41c090b5cc8d13dc8fca7b77 SHA-256: b0f584d4463b981d4a27fc0bf016f206fc623cc354500cd3fe6d03c0ed9881f5
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also features a large number of external links, many of which appear to be part of a link farm, suggesting a phishing or scamming operation. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious sites or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 5

  • 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
  • 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-girl-avatar-game-hack PDF link annotation
    • http://perpus.poltekeskupang.ac.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-free-robux-without-verification-or-surveys_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_off00004e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E20 24572 bytes
SHA-256: cfa453b3bc2f3bd6f16cd4176c659ffe9eedbc11e427f192c4ed08d5eeb03a14
font_01_sfnt_off00008541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8541 18352 bytes
SHA-256: e36a25ea5977c05650501b54a51bfd2162cff2cd65afcc33dd88b4235e6b064c

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