Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84ad5386bbde673…

MALICIOUS

PDF

34.5 KB Created: 2021-06-18 02:04:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7c314cbff422aa972bb7f6f7ee49a9c3 SHA-1: 6177eb1565c2229ea20df0c0ea08fcb054aabd39 SHA-256: c84ad5386bbde673c6d145f36be07f44a4e9cdcc3cf01a9f07c3281303caa0be
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document is designed to lure users into clicking malicious links by offering fake game hacks and presenting a fake CAPTCHA. The document contains numerous links to external websites, many of which appear to be part of a link farm for SEO manipulation. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-mm2-free-godly-game-hack, which is likely a redirector to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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 http://netcdn.co/app/431946152/roblox-mm2-free-godly-game-hack PDF link annotation
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/tiktok-free-to-watch-online_GM835599320.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/tiktok-free-on-google_GM835599320.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.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_off00002f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F24 22024 bytes
SHA-256: cc3baa27ab803a99f643e7d3e94d5892d57abb94b8f75c5d7f3bd6bf9367f6b3
font_01_sfnt_off00006007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6007 19584 bytes
SHA-256: 3c933a0cdb8c04cb3114515b399448a2c207aeb530232021fdd8549ad1104311

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