Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0f19426de20c4d…

MALICIOUS

PDF

41.6 KB Created: 2021-05-17 17:30:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ce836425e22bea9d0a7190271a5a1e23 SHA-1: 69e1df3459d6d1c6bb27f24584d857579eae6ca7 SHA-256: bc0f19426de20c4d407315132a710944be7393f89b9a007835fa2b6445628426
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to external websites, specifically promoting 'free Robux' or game hacks. These links are designed to lure users to potentially malicious sites. The ML classifier strongly indicated maliciousness, and the presence of multiple game hack lures suggests a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/how-to-get-free-robux-on-computer-game-hack PDF link annotation
    • http://kumotor.com.tw/upload/userfiles/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/robux-premium_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/robux-gainer_GM431946152.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://kumotor.com.tw/upload/userfiles/files/25-free-spins-coin-master_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
stream_003_off000046bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46BD 24416 bytes
SHA-256: 346abbe7f9c098a7223a3edaa27f065f9035dc39948c32888894d307489b4872
font_01_sfnt_off00007ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC1 18716 bytes
SHA-256: 2c87d7c74b7bcd7fade186f781764640e14dfaf637cd5e280742c056ede93ace

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