Malicious PDF — malware analysis report

Static analysis result for SHA-256 497f9d0b81330820…

MALICIOUS

PDF

33.5 KB Created: 2021-07-07 18:33:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3456340b4fff47f99ccd78977447f0f5 SHA-1: d714f16dc896686c4d167bf6c7ee0c2378c971f5 SHA-256: 497f9d0b813308203442c392ec1b77ebafa36129b1315fba4012b17808956549
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/406889139/coinmasterfree-game-hack PDF link annotation
    • http://bw.ac.th/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/114-hacks_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-hack-a-roblox-account-easy-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-skin-strucid-roblox_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/robux-free-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-do-you-hack-gems-in-royale-high-roblox_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-roblox-user-and-password_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-free-robux-iphone-7_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-roblox-clothes-codes_GM431946152.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
stream_002_off00002dfe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DFE 22732 bytes
SHA-256: b73bd0df72598c52666bd1f51e28d7d97fdc319c077ca33d0e4977bc6de56c5a
font_01_sfnt_off000060fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FE 18092 bytes
SHA-256: e3b824c700fc1afb9be61c0fda879df8bb3fefe3698910b387f7b25b5267b414

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