Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b04a68b49962341…

MALICIOUS

PDF

37.4 KB Created: 2021-07-05 19:31:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c48a70d6f2887fa2a06bc090a9c20785 SHA-1: 9d1463ebeda3cf7e2b5a74bf5c980bcf933d886f SHA-256: 2b04a68b49962341466d58c686dfdf40f5676fbbf5e30b76254d75fff5de8947
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a game hack lure, specifically directing users to 'http://netcdn.tw/app/406889139/free-spin-link-coin-master-game-hack'. This URL is likely intended to host a malicious payload or redirect to a phishing site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded link is the primary indicator of malicious intent.

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/free-spin-link-coin-master-game-hack PDF link annotation
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/how-to-make-a-badge-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/roblox-account-hacking-program_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/e-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2pontianak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003be5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3BE5 23016 bytes
SHA-256: a267c4cae78d5f3864c303ddf9ddc42596daf7ada0e839a6688c0cfe886bde3e
font_01_sfnt_off00006f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F86 18344 bytes
SHA-256: 05274da8f0b2c24f990b03f912799dd404877cbb0fa71ac5363d7c288192e7fe

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