Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa15aef3a21ae9f…

MALICIOUS

PDF

42.1 KB Created: 2021-04-23 17:19:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e1b99f6459978b8c00493c026bbe9af3 SHA-1: a4bd7ddc866f59c92d017fff71f35c0b37a663c8 SHA-256: efa15aef3a21ae9f0111c74bc5e76df3a4d97d365346b0b7e4a8857629aae0ab
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 0.9941

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://netsecure.top/app/431946152/nombres-de-hacks-para-roblox-game-hack PDF link annotation
    • https://studentcareerinfo.com/images/free-robux-hack-2021-no-download.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-robux-that-actually-works.pdfIn PDF document text
    • https://studentcareerinfo.com/images/roblox-girl-shirt-template-free-shipping.pdfIn PDF document text
    • https://studentcareerinfo.com/images/pirates-wrath-roblox-hacks.pdfIn PDF document text
    • https://studentcareerinfo.com/images/caught-my-girlfriend-cheating-in-roblox.pdfIn PDF document text
    • https://studentcareerinfo.com/images/roblox-level-7-hacks.pdfIn PDF document text
    • https://studentcareerinfo.com/images/2021-how-to-free-admin-commands-to-your-roblox-gane.pdfIn PDF document text
    • https://studentcareerinfo.com/images/free-robux-android-no-verification.pdfIn PDF document text
    • https://studentcareerinfo.com/images/how-did-roblox-get-hacked.pdfIn PDF document text
    • https://studentcareerinfo.com/images/roblox-free-10-robux.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
font_00_sfnt_off00004583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4583 27220 bytes
SHA-256: ba1fa4da0516fd59dd55968ca9188899d685e249bb8da266b73e3615fc3e17ff
font_01_sfnt_off00008151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8151 18764 bytes
SHA-256: b104745ce90c3e8437b44a0af72874bcb8e91ec4adb089ad450f1ff37eebeff7

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