Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2666597981598b…

MALICIOUS

PDF

41.1 KB Created: 2021-04-23 21:20:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d6cb5d0832e6140e7cfe646243ebd819 SHA-1: e7ac51dfa1a100353b17b36e7ecd3e614a410f6c SHA-256: 8b2666597981598b7d9ede68decbf9bb9392c4c2e5d984ca1b7510dcb73e270b
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/squid-roblox-hack-game-hack PDF link annotation
    • http://arcnjournals.org/images/get-free-robux-no-human-verification-or-survey.pdfIn PDF document text
    • http://arcnjournals.org/images/cheat-jailbreak-roblox-money-2021.pdfIn PDF document text
    • http://arcnjournals.org/images/roblox-for-free-without-signing-in.pdfIn PDF document text
    • http://arcnjournals.org/images/juno-hack-filedropper-roblox.pdfIn PDF document text
    • http://arcnjournals.org/images/assassin-free-admin-roblox.pdfIn PDF document text
    • http://arcnjournals.org/images/free-roblox-place-visits.pdfIn PDF document text
    • http://arcnjournals.org/images/roblox-got-talent-piano-hack-script.pdfIn PDF document text
    • http://arcnjournals.org/images/hack-roblox-counter-blox-2021.pdfIn PDF document text
    • http://arcnjournals.org/images/how-to-cheat-in-roblox-boxing-simulator.pdfIn PDF document text
    • http://arcnjournals.org/images/free-robux-games-2021.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_off00003f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F77 27544 bytes
SHA-256: 6a5a4910e8ca5cb91a26e21ee386a6d133a2b7902a1a28f2093aade70b5f39c0
font_01_sfnt_off00007d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4F 18788 bytes
SHA-256: a91ca76a557ed636fa468ccbd77786dea7ef54927c80dac6ed6e16b96ad505a7

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