Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4519dd571e7377b…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 17:50:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b7668c085ecff0f72a12b6de7d7c9efe SHA-1: d82e5e6479d715d4732b0a0cba553959a2a98f5d SHA-256: a4519dd571e7377b3b82baf26c2abfd0ce481d08ce1809ab734b9217a5d1a610
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous embedded URLs related to game hacks and free currency, strongly suggesting a lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the document's theme indicate an attempt to trick users into visiting 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.tw/app/835599320/tiktok-free-robux-codes-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/dfield-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-scripts-prison-life-hacks-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/builder-ship-for-treasure-in-roblox-for-free-game_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-you-only-hack-roblox-once_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-booga-booga-hacks-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-surbey_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-account-selling-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/corn-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-roblox-hack-your-phone_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-slurp-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-and-coins-for-iphone_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_off0000333e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x333E 21728 bytes
SHA-256: ccda42da0843c9d322ded50e13f0b9c466993d9b8fc3631be5e5a12815c35d01
font_01_sfnt_off00006311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 18652 bytes
SHA-256: 05050119ef5e291a15488da93c7407b81bd8b5ab9f6ca77c7888ca47432a6d2e

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