Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e769933f47bb6f6…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 13:54:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c21da911711fd458e9e70439d28b6f6d SHA-1: 6ca39dc4210535f104a63ae1d2b457bd793e796e SHA-256: 3e769933f47bb6f64448461b7490d5e3d82c4918bcd3a7702a499f464606eeb2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document lures users with the promise of free Robux, a common tactic for distributing malware. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent. The heuristic for password-protected archives suggests a method to bypass security scans, further supporting the malicious nature of the file.

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/how-to-et-free-robux-april-2021-game-hack PDF link annotation
    • http://library.fk.upnvj.ac.id/repository/roblox-gift-card-codes-for-free-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/pay-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/gcomment-hacker-strucid-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-2021-rich-accounts-logins_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-passwords-with-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-free-redeem-card_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-stop-roblox-from-crashing-when-using-hacks_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-paid-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-game-roblox-download_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-sad-cheat-story_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-on-computer-hack-inspecting_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-apk-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/best-websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/was-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-hack-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-daily-free-spins-link-app_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_off00003224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3224 22388 bytes
SHA-256: a3711026cf105ae39e306d0c706c069c5683334eac6f5cd1d46609e6d4674df3
font_01_sfnt_off0000641c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 19756 bytes
SHA-256: 92810ceb866c808b4a828b0edaa3b7b802f0fa12556dae3270fab8ffab143b5d

Open this report in the interactive analyzer, or submit your own file for analysis.