Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b293e67bc03a89…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 04:51:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aaa9489192e67514bb5dd9ae03dd79b2 SHA-1: 09a4e345aaa81cb3af6103720ad3b9b59a605d0c SHA-256: 57b293e67bc03a897cd5791469469c4016d0631d49505e48a449c2b49d935129
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The embedded URL, https://netcdn.online/app/406889139/coin-master-free-spins-generator-no-verification-game-hack, is the primary indicator of malicious intent. While no scripts were extracted, the document's structure and the nature of the lure suggest it is designed to trick users into visiting a potentially malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-free-spins-generator-no-verification-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/tiktok-free-credit_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-get-free-spins-on-coin-master_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_004_off000052d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D4 25440 bytes
SHA-256: 4cc93974d907a6d169c31060e168746f67d40a493d99e9b5b14cad01a6de81b5
font_01_sfnt_off00008c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C96 18020 bytes
SHA-256: cc763048b76c9189c14999db918bcac9f3f262aeea1a03aaf6cd39ac3f323e93

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