Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d2a1f2988ae91b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 21:41:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f17398573f40e748562f0612c56763ad SHA-1: 344a0237ee5acb3688ad188b496bc49b9c0bad30 SHA-256: 91d2a1f2988ae91bb04b8cf949910f69c3cf2241c92946fc5716b70b4d7e4314
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document body and extracted URLs indicate a lure for free game items (Roblox, etc.), a common tactic for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the document's theme suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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-get-free-roblox-account-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/hack-tools-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-view-iphone-keychain_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-cafe-groups_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/does-john-doe-actually-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-anti-cheat-script_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pastebin-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-u-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-max_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/oh-no-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-accounts-2021-bugmenot_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-cool-free-tshirts_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-pet-food-free_GM406889139.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_off00002fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC0 22988 bytes
SHA-256: 663c5c56d73da85ae28e7624797564a92d2d69a947d1c661ac90754caf62b49a
font_01_sfnt_off00006342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6342 19056 bytes
SHA-256: f72d1eddb0bd22f523913ffcf1cab87d16d9a16e089246121e49acd587a59458

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