Malicious PDF — malware analysis report

Static analysis result for SHA-256 333b0f331bf1a75c…

MALICIOUS

PDF

44.0 KB Created: 2021-05-12 11:39:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aee8496cab008f03386df68f04cf3631 SHA-1: ef0cf35813cc7a262e5dc5010e6063cf1e7b5554 SHA-256: 333b0f331bf1a75cc8d6cc801b51b972a2e0c83d55df1bcb14419e70b81f9c9a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' lure. The embedded URL, https://netcdn.xyz/app/406889139/free-coins-coin-master-blog-game-hack, likely leads to a malicious site designed to trick users into downloading malware or revealing sensitive information. Although no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's intended to facilitate initial access via social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/free-coins-coin-master-blog-game-hack PDF link annotation
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-coin-master-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-can-i-get-free-robux_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_off00004900.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4900 24380 bytes
SHA-256: 1fd999b00e7bc2bfe77dea3effa39c0c68473436f36ab1ac8f72ca62c0fcbf1b
font_01_sfnt_off00007f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F96 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8947 18288 bytes
SHA-256: 525699ae71861fffeab431a07c950b4914d38a871fb98becad0e0bea9ac3f1df

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