Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e822767bd0071b…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 18:21:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4e6ba18e3168c60159c1a04f01c84f0d SHA-1: c3daf005564f8c8e928ce0e6caccd30674fdbb6e SHA-256: 19e822767bd0071bcc1cf32d4bffa9bf7d55941a9e8216b7240857c3b2b6882b
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a fake browser/software-install lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/sites-to-get-free-robux-game-hack PDF link annotation
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/can-you-get-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-roblox-accounts-discord_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/eating-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/hacks-for-prison-life-roblox_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-dominus-hat-in-roblox_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/hgood-websites-to-get-free-robux-from_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/robux-free-generator-no-survey-or-human-verification_GM431946152.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_off000030ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FF 22292 bytes
SHA-256: bbfcc64109be4b2b6978f31454b879ac4635c950911de6b7eb8d05ddc3b4b8c7
font_01_sfnt_off00006255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6255 18940 bytes
SHA-256: 12a760e2c1ec97f90af30afb205c0b6409d60b5d12cf2c59927e5ecc658ee3cf

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