Malicious PDF — malware analysis report

Static analysis result for SHA-256 351adf387ac6546d…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 06:45:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b5af130ffc9713c095a4d2a7cc058fbd SHA-1: aeace60109f05002b4f051bc8799f81a3ee920d3 SHA-256: 351adf387ac6546d678f959ef6f9ccae75001789a187c3be30dc2d580b66f587
82 Risk Score

Malware Insights

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

This PDF document uses a lure related to "free Robux" and game hacks to entice users to click on embedded links. The primary link redirects to a malicious domain, likely to download a second-stage payload or lead to further exploitation. The ML classifier strongly indicated maliciousness, and the PDF URI heuristics confirm the redirection to a known lure site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.online/app/431946152/how-to-get-free-robux-game-hack PDF link annotation
    • https://kojak-group.com/userfiles/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-coins-coin-master-no-human-verification_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_off00004f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F91 24780 bytes
SHA-256: e48128ade2cf872fbf0119033442d7297a2b08b527a862619b4120acbd7e3b7d
font_01_sfnt_off00008855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8855 18280 bytes
SHA-256: 2eeeedfcb2f224ab556fa0ab031baeab03f86dcbcf90e3baaaf5b6d88536dec3

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