Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d3d0c578f1fb18…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 04:35:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 74b8e3b1753026e44c2fb0918c42b8db SHA-1: 9e461d2e9d4f2b3508d90ff99c0c30da3dfa6279 SHA-256: b9d3d0c578f1fb18282ad263b3a94800db96cfe906915b99e360b484246c9152
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/free-robux-no-verification-no-download-2021-game-hack PDF link annotation
    • http://oca.undil.tl/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-hack-someones-character-in-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-cheat-engine-bypass-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/village-coin_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-fly-hack-download-free_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3056 22008 bytes
SHA-256: 437ef16f108b3e63981d14e383e98ee10e03ea66dfa59e522199e585584f8144
font_01_sfnt_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 20056 bytes
SHA-256: dce3349a9d9044df76718d11f8b674b72a03639a731a3e35bf809eb868dd5616

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