Malicious PDF — malware analysis report

Static analysis result for SHA-256 15083730c1d3654b…

MALICIOUS

PDF

46.7 KB Created: 2021-06-11 11:41:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 324bffe245ba3cdab015d386da3f24d7 SHA-1: ad566d6a025aefbef43d9552ac8c885957248b8e SHA-256: 15083730c1d3654b8f5aa253193a2160e0ffddc223a2dcddd71074caa2c578cb
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to lure the user into clicking a link, which leads to a download. The embedded URL and numerous other URLs point to potentially malicious applications, suggesting a downloader or trojan. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.tw/app/431946152/apk-mod-hack-roblox-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-break-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-de-juegos-apk-robux-gratis_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-cp_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/pubg-uc-avatar_GM1330123889.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-card-number-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/top-5-juego-hackeado-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://www.bandicam.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005186.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5186 28556 bytes
SHA-256: 5517d4d742cb867370bc634eaed8fcc38c2c3d3357bf087fe732bc78f151d752
font_01_sfnt_off000092ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AC 18728 bytes
SHA-256: 4258306d62da7c244c6cc55a9da503c56b67043f110777c9db8b37e509c30e66

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