Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4f91adcebf4eaa…

MALICIOUS

PDF

34.9 KB Created: 2021-06-19 06:06:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 88c4bf7f7447a2186d470bafc7217361 SHA-1: d531da9524f492492504574fad7d4561927037c8 SHA-256: 3b4f91adcebf4eaadea8037e4f9fafdbd2a630bb8a622a9f327585e8b8ccd6ff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 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.co/app/431946152/roblox-what-day-is-restaurant-tycoon-2-coming-for-free-game-hack PDF link annotation
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/top-kek-v4-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-mobile-24-com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/google-how-do-you-get-robux_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_off00002e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E45 22348 bytes
SHA-256: c1fe61f35067aecbfe4e22506bfcbcac579776367a031f0ccf4d01bd0d3b1718
font_01_sfnt_off00006028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6028 20108 bytes
SHA-256: ce6c35f757ee5f7df68b180933ce169a849cb1d4ff904478379c079c3f795a47

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