Malicious PDF — malware analysis report

Static analysis result for SHA-256 525544cc606cda5e…

MALICIOUS

PDF

33.5 KB Created: 2021-07-06 00:16:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 40a9bac81275782d2c9f1f86ec0e9af8 SHA-1: 9cd0b598e9f6eef7705a4029f9353677b3e7953f SHA-256: 525544cc606cda5ef38c61c28e02c70896c4faaf73e112e35bb7761d8de1260d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'free generator / game hack' site. This suggests a social engineering tactic to trick users into visiting a potentially malicious domain. While no scripts were explicitly extracted, the presence of JavaScript-related lures and the ML classifier's high confidence indicate a malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.tw/app/431946152/javascript-free-robux-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/shirt-template-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-make-shirts-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-free-items-promo-codes_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-back-accessories-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-builders-club-free-codes_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-email-verification_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/april-2021-roblox-hacking_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/cch-ly-robux-free-tren-may-tinh_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-case-clicker-cheat_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-generator-no-download-no-surveys-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-h-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/follow-bor-roblox-hack_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-windows-10-key-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_off00002b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B1C 22536 bytes
SHA-256: 2b69bb26003e9833d622c38549344693d795e5a82c9a494e2f32862241449453
font_01_sfnt_off00005d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3A 19396 bytes
SHA-256: 8082ed7272a1262ff2ef05dc2b92dbfce3456c02539d76afbac634f6d087bf75

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