Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc5ee3070aecea1…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 12:05:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 44486dfc591375c497e88e50ff0f4252 SHA-1: 2700a8ce44eaf0fc96cbefc1897ab59367cb369d SHA-256: 1bc5ee3070aecea122e59aef0a4d13b183edb9942b81cb267e9bfc527a8ffbda
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a heuristic firing for a game hack redirect lure, indicating a phishing attempt. The primary malicious URL identified is https://netcdn.online/app/406889139/app-master-game-hack, which likely serves as a landing page for malware or further phishing content. No scripts were extracted, but the document structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/app-master-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/pokemon-go-free-levels_GM1094591345.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-come_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-to-village-3-in-coin-master_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_004_off00005074.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5074 24608 bytes
SHA-256: 97bbe4120bceff0f2643fc580a045ed3aa15b8079829a34dea579cfa7d7ef292
font_01_sfnt_off000088f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F8 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000092aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AA 17460 bytes
SHA-256: 4464f59f323fc065d9701067f709c7b39ed9c448b1d3d372901e8849389ccaec

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