Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3998799e6d05e9…

MALICIOUS

PDF

34.0 KB Created: 2021-06-25 18:22:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e4e32695b50f80410ea67ed8cce2ee5a SHA-1: 93f9d52189f49d8aedacf7696621edfe0f3a893d SHA-256: 9c3998799e6d05e936d7a226a6edd03edfeee8ddca77608ccbd2285c1a541f56
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a specific URL, all related to game hacks and virtual currency, suggesting a lure for users to visit malicious sites. The heuristic findings indicate a link farm and a high ML classification score, reinforcing the malicious nature of the document. While no scripts were explicitly extracted, the structure and content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.co/app/431946152/how-to-hack-and-get-so-much-money-roblox-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-back-a-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/descargar-hacks-para-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-full-colour-brown-pant-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/best-roblox-shirt-maker-for-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-make-clothes-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-picture-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-thinknoodles-roblox-account_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-ohne-verifizierung_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-real_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_off00002d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D65 21904 bytes
SHA-256: 2251420f9db346e49082c27d6dd8fa57b52a82c8152d89a13ea785dd170e069a
font_01_sfnt_off00005da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA4 19780 bytes
SHA-256: a96560fe3e6b2a4552513579ba205eb2a5be3d556d4916dc41bf8d011177abcb

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