Malicious PDF — malware analysis report

Static analysis result for SHA-256 953b6c0d982c9caa…

MALICIOUS

PDF

49.3 KB Created: 2021-06-03 05:44:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 81225a4eb4e1270298267866d73a0c5a SHA-1: 12eeae071783c20127e37ab3c69c49f487848904 SHA-256: 953b6c0d982c9caa2180952dd3de3d1c1ef63555d81adf30431f36c6482da0a2
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 0.9796

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 https://netcdn.online/app/431946152/robux-codes-game-hack PDF link annotation
    • http://oca.undil.tl/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/pokemon-go-free-pokeballs-promo-code_GM1094591345.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4C 28924 bytes
SHA-256: e0fba85ecd72759839e90ce38ea28ee8c2df560791e61c512804589e602516cf
font_01_sfnt_off00009244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9244 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off00009eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EEB 18024 bytes
SHA-256: efd3d7019031a842dae2276fdcf19d9726d4034b37c2d895580446cf97336b03

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