Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b755ee73e04109d…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 20:32:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a6dfa415eed67a26ab5ebf34c95469bd SHA-1: 2638479159c5962363ae0b37318798b8f4e4d10b SHA-256: 7b755ee73e04109d9cbf5d9f25ba6a5661b1ab2e7f5ce684d85ee4cac82bbd0a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains a lure related to game hacks and free in-game currency, directing the user to a suspicious URL for download. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a malicious intent to redirect users to potentially harmful content. The heuristic for password-protected archives suggests a common technique to evade security scanning.

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/479516143/what-is-wurst-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-accocunt_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-hacks-w_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/robux-offers_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-coin-master-haktuts_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_off00003448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3448 22928 bytes
SHA-256: 1739104ede91fc5660c2aa96c7a0f473bc3871aa4eef48164d82189fde61038b
font_01_sfnt_off0000678e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678E 18240 bytes
SHA-256: 2bf2c2405d05d574d9200d826fed10f2ff662e6ce33c6eb1523d52c60ce9efde

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