Malicious PDF — malware analysis report

Static analysis result for SHA-256 b263ca52b8396fd6…

MALICIOUS

PDF

41.8 KB Created: 2021-05-10 18:01:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2eb8af4c1a601d5075ba61ab29c0e65b SHA-1: 1be9111aab01fdb1a99ec8f69f730da833a2de31 SHA-256: b263ca52b8396fd6117a31353354e9fb902071952ccbc6c292def91c42c35b47
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of game hacks and free currency to entice users. It contains multiple embedded URLs pointing to external sites, such as 'https://netcdn.xyz/app/406889139/hacks-for-coin-master-game-hack', which are likely designed to deliver further malicious payloads or lead to phishing pages. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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/406889139/hacks-for-coin-master-game-hack PDF link annotation
    • http://mohacad.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/robux-match_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/como-hackear-juego-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_003_off00003f56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F56 24788 bytes
SHA-256: 6989742178d9f0abc0173be22312b326d95e95ea51518a41b359b6853debddb0
font_01_sfnt_off00007838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7838 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8223 17880 bytes
SHA-256: aa3394458939619806496cbc198b043db21b7abc6a7e758b364f4c9fc0519879

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