Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c99d107de5d195…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 06:36:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3dba4f3e0fc9161c9d1eaa72994bc43c SHA-1: 44f667cfcfe534f2ddbabc1220e2683eed292e5f SHA-256: 05c99d107de5d195f3521d8e42b0200b335497bbc0acb67807ffb09cf8177372
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. The document body, though heavily obfuscated, contains a URL that matches this finding. This suggests the PDF is designed to trick users into visiting a malicious site, likely for malware distribution or phishing. No scripts were extracted, limiting further analysis of the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/how-to-hack-coin-master-facebook-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id//repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robux-earner_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/pubg-uc-zing_GM1330123889.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robux-match_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-hacked-com-2021_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_004_off000051c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C6 24764 bytes
SHA-256: 4667ff25a0710ef760d66a6187f065234945a46f5474e1cebab599916d080942
font_01_sfnt_off00008abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ABC 3380 bytes
SHA-256: cb8371cc187c45116d0984119c2893dd3db0d7f7d568d007a419406e6ca9f389
font_02_sfnt_off000096a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A9 18200 bytes
SHA-256: 8e8ec0f975961d2350ea51926afe2b17ad27ef08b7a7cfd0d75dd5f13f2b8752

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