Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c38149407b82e0…

MALICIOUS

PDF

42.1 KB Created: 2021-05-14 01:53:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d8a75b4c62172db303b4de1f6825fcc7 SHA-1: 84ca4069a2e5097adb3d71b1253611639bf51ea4 SHA-256: 45c38149407b82e00a6a0a335e9754c74fb459a96da6a920b38ef1cf7cbc1d89
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-unlimited-free-spins-link-2021-game-hack PDF link annotation
    • https://kalendarite.eu/images/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/robux-2021_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/give-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/minecraft-hack-client-download_GM479516143.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_003_off00004909.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4909 24100 bytes
SHA-256: 664fd65990fa59d5388f97ae1f0249f60549d568ad3ac1285aa2678f0aeb1d27
font_01_sfnt_off00007fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBE 19152 bytes
SHA-256: 5881489854435c4df30fbeeaf3dcf370e1cc518be434610ef19958204180da95

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