Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9733ee54c5f663…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 20:27:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: be7f4d05de27d745d457632b17b269b9 SHA-1: 8606157eeab03a1f11d5f6c8b57feedc607385b5 SHA-256: 4a9733ee54c5f66305f5fe1d3b348e0fefdbde32352a188581f2d38b1d4f49e8
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.tw/app/431946152/how-to-get-free-hair-on-roblox-2021-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-twitter-hacked_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-hack-for-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-spins-in-coin-master_GM406889139.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_off00002fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBB 22416 bytes
SHA-256: 920e3d92af6e1f914e13415cdef5bf3e4f03c8ded361ecfe37e7b5b0b960a3ee
font_01_sfnt_off00006195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6195 19440 bytes
SHA-256: 526724cde6bc47c97002da289a9f95b858f14f71f8bbba163578d631e24a590b

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