Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7cdab7a37ece7a4…

MALICIOUS

PDF

43.7 KB Created: 2021-06-14 00:51:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f48d2fcbf289c0ff7be873f16d2c5e0a SHA-1: dc26f4bed271b1feb3276635b0d0d49e953d76eb SHA-256: d7cdab7a37ece7a4c675b150380625cb801ba349d53dceed6604a38426618a39
90 Risk Score

Malware Insights

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

The PDF document contains lures for 'free Robux' and uses urgency language, aiming to trick users into clicking embedded links. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a password archive lure indicates a likely attempt to deliver a secondary payload. The primary IOC is the URL used for the download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.co/app/431946152/free-robux-codes-no-human-verification-game-hack PDF link annotation
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-robux-inspect-hack_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-get-free-robux-on-ipod-touch_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/click-to-teleport-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-assassin-coin-hack-2021_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/intriga-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-but_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-hack-in-asssin-roblox_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/how-to-get-free-robux_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004be0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BE0 25708 bytes
SHA-256: 0a36907e87221118e4f7447edbf989cc4c117624ea96cfab2284a707c22de035
font_01_sfnt_off00008667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8667 19032 bytes
SHA-256: 7535c842b13f5ab09a8d1f6df205e44a1f60a7fdf3d88b4466f5e7b4ed5bfe6e

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