Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c7c7fcc6146582…

MALICIOUS

PDF

52.3 KB Created: 2021-05-19 05:45:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4803b6194d1a8ed0703bcacf7c980409 SHA-1: 0b80381c305591b606176043459cc4987e90472a SHA-256: 40c7c7fcc61465821103e57354ebdce9bde4bdc37196da4412797ed526b02313
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into downloading a malicious application. It contains an embedded URI pointing to a suspicious executable and multiple links to potentially malicious PDF files hosted on external domains. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8646

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.xyz/app/431946152/roblox-apk-hack-game-hack PDF link annotation
    • http://library.fisip.upnvj.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-private-server-roblox_GM431946152.pdfIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D74 29768 bytes
SHA-256: 42b694dc0b0ebffc3f0a16f157c5d7d5d11f1d280e1998fc55e3cdb0733583b9
font_01_sfnt_off00009216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9216 2988 bytes
SHA-256: 86c7b8e863ba3cdd86a2b7d37e0f8d61c17256aa2be4fd900a87743a1b0c58ac
font_02_sfnt_off00009c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C61 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA973 18356 bytes
SHA-256: 7e836b6261bebb63fda2bc6c603fa398fe0a548bc6334e21915c3f4956160db8

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