Malicious PDF — malware analysis report

Static analysis result for SHA-256 617b3bfdcd899341…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 03:44:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b3c38a29338092a6966b834815208d45 SHA-1: c121352e332e70abec5b92867b898082f50ddf5e SHA-256: 617b3bfdcd899341f509dd9e904c94ad565b6e964d0f2a811b7b033447372d76
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/crazy-roblox-hack-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/a-real-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-candy-van-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-work-at-pizzqa-place-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-without-verification_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_off00002fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC2 22652 bytes
SHA-256: 5f1acb98f2ed0bbf9fd960a4629a52c6e3fce2b8e032429bac116533ee85aa74
font_01_sfnt_off0000628c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628C 18920 bytes
SHA-256: 3f5ad7153a525fc3d3541ed517c598d745e4ff10ac21b0929e96fee8f10e3052

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