Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d24d9ad9d9cd98b…

MALICIOUS

PDF

44.7 KB Created: 2021-05-19 10:07:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4198fb9349d6daf3c80419dfd4361f5c SHA-1: 6c9cbf09d1744fb726639201c40307a0b754f189 SHA-256: 5d24d9ad9d9cd98bd0da80d00c616ab668e76022bbd9f3bbea83b6ea7c162301
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one pointing to a 'coin-master-free-spins-2021-app-download-game-hack' URL, which is a common lure for social engineering attacks. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-free-spins-2021-app-download-game-hack PDF link annotation
    • http://learningarabic.co.uk/images/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/earn-rbx_GM431946152.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_off000048a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A0 24472 bytes
SHA-256: 622ebe18c5eb960e5819e0194a68731d23d0f8b8bcf3563d3ec5847e35adcea0
font_01_sfnt_off00008012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8012 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off000089fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FC 18868 bytes
SHA-256: b751cdaf37495e2cbea790aaa61ad6b08870d96184a8696588416af24de27b3d

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