Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac2920f8b6de62f…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 10:16:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e2a0bc0592855169ec42a147842836b6 SHA-1: c7a1f02b20d9d5f0f3fdd8ecbf4d6184d642ddd5 SHA-256: 7ac2920f8b6de62fbad69d9340634e575ebe2b03754ecde464b9a860c491e340
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains an embedded URL pointing to a suspicious domain, likely intended to host a malicious payload. Heuristics indicate the document uses a 'download button' lure and suggests password protection for an archive, common tactics for distributing malware. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/free-roblox-printables-game-hack PDF link annotation
    • http://library.unissula.ac.id/fe/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-change-your-skin-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/download-roblox-for-free-without-any-passwords_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-jailbreak-beta-cheats_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-account-roblox-com_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/tiktok-free-likercom_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-5-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/spin-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-sans-face-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-do-you-hack-admin-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-cards-and-spin-link_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_off00002fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBB 22624 bytes
SHA-256: 80e8aead33cff252c442f82e2f5dd88a8ee30de8cf9113e7fe73dd85ef08a93a
font_01_sfnt_off0000625a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625A 19028 bytes
SHA-256: 1b1bed31e01b267d37930b89e407ed752ed8ac45c73a01641f66f0431698b544

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