Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b67e9b761ddf9af…

MALICIOUS

PDF

45.9 KB Created: 2021-05-11 02:04:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b260e128c280b00e491a13c1b921deac SHA-1: 6bb41fcd3e762fcae611cffe24031e646e37e976 SHA-256: 2b67e9b761ddf9afab80dd54fe4448a52d61dc92429fcbe23a85561d3ed1fb87
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'free Robux' and game hacks, directing users to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content or download further payloads. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/free-robux-only-username-no-human-verification-game-hack PDF link annotation
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-mobile_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_off00004abe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABE 24724 bytes
SHA-256: 412b2138726617e79d3a545faa177cdc7c7b5f0dfcddec51c8fb869bc151a245
font_01_sfnt_off00008426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8426 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD5 19300 bytes
SHA-256: 0069d31deed1bc6c2f872d57868e98b772485fef1053c0a123ffd6dc6d604850

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