Malicious PDF — malware analysis report

Static analysis result for SHA-256 166e6a85b3bfd476…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 15:15:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e5746f7ecf2a085b9c2d1f828268bc17 SHA-1: a0fd8401e27edbc796c7caa841f424d763602ae9 SHA-256: 166e6a85b3bfd4766c71510bbe049791fe292d3a068c80da3cc2b37018bfead2
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 0.9980

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 http://netcdn.tw/app/431946152/roblox-sexually-game-hack PDF link annotation
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/prison-life-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/tons-of-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-deadcores-in-labyrinth-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-birthday-glitch_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-spin-wheel_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/best-free-avatar-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-r-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-hack-real-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hack-retail-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/on-roblox-how-to-get-robux-for-free_GM431946152.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_off0000332d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x332D 22432 bytes
SHA-256: df9a8086469c66092ecaee865d57438de06406949361023d0b3d8a569cd700ca
font_01_sfnt_off00006564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6564 18804 bytes
SHA-256: ac65bc2350733491bf8b1f5a6175b8e6669ededf8897379c42ae9d533bb69578

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