Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c62e4c9bff2c58…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 12:01:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5641ee08b0376efc4e8168c9543fae19 SHA-1: b3c36e265b9c0096836f0412c26ce87f658efa1d SHA-256: 36c62e4c9bff2c58ba3e2d33949fa42c6bfb2fd044a78aecd97ac1c4d88d3e76
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs disguised as links to free game hacks and currency. The heuristic 'PDF_CAPTCHA_LINK_LURE' indicates that these links are likely designed to trick users into completing CAPTCHAs or visiting malicious sites. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the document's structure and embedded URLs point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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/479516143/minecraft-free-ios-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-shard-online-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/promo-codes-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-boombox-games-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hacks-fr-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-no-captcha_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-on-roblox-october-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-code-gen_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-a-free-gear-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-verification-no-survey_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_off000032d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D4 21968 bytes
SHA-256: 0090dbcd337e1cdb901838f7edba1c8779eb633ea78bc44c681d931a47a45e4a
font_01_sfnt_off00006353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6353 17996 bytes
SHA-256: c69302d64d01fed68f7faa121aa3d2ae3c207c1a6baca3325fd70ae8fd84539d

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