Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b1c057108d6203…

MALICIOUS

PDF

34.9 KB Created: 2021-07-09 06:24:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5f4b1f85f63d6f109e3aa660e63697bb SHA-1: 585e2d7fad70292a95396d56e05198fad9f3af3f SHA-256: 15b1c057108d62033c774ae3bb2057220ed8919076500e8b106692f9c2c6c115
122 Risk Score

Malware Insights

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

The PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains multiple embedded URLs, including one pointing to 'netcdn.tw', which likely serves as a redirector to malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may instruct users to open a password-protected archive, a technique often used to bypass security filters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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-earn-robux-for-free-2021-game-hack PDF link annotation
    • https://library.elkatarie.ac.id/repository/get4mobilebiz-free-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-the-tix-beanie-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-robux-giver-free-download_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-noclip-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-robux-hack-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-roblox-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-hack-a-roblox-profile-youtube_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-cheat-codes-mega-fun-obby_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-by-just-generating-survey_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-by-joining-a-group_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-roblox-username-and-password-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/break-free-roblox-music-video_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/wls-3-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-generator-download-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/new-free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-roblox-accounts-with-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-hack-someones-roblox-password_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
font_00_sfnt_off00002fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB0 22752 bytes
SHA-256: 839083fa0c7fc1023f9c0a17c5c30bc0daf3463922821da67e058cbf101be09a
font_01_sfnt_off00006296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 19284 bytes
SHA-256: b399ae733d7917559aeb38653f56690fc8d0842846df9d5376906f0eed96920f

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