Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f31dbe0190ac88a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-01 11:40:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e12cc589651e7e8e10c8c79682dec214 SHA-1: efc17ca01f8228b03ba872914fefb9b5974c17b1 SHA-256: 5f31dbe0190ac88a604e194fb82e9a379b59f6f5c8418d94ce98224fe707554a
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.co/app/431946152/how-to-get-robux-on-roblox-for-free-2021-game-hack PDF link annotation
    • http://ofthalmiatrosthess.gr/images/roblox-retro-craftwars-script-hack_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/how-to-get-free-robux-hard_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/howto-wall-hack-roblox_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/roblox-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/hack-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/login-robux_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/how-to-hack-mocap-dancing-in-roblox_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/roblox-free-robux-hack-no-password_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-fedora-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/youtube-how-to-get-free-robux-without-human-verifaction_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-roblox-names-and-passwords_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/hackear-roblox-gratis_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_off00003081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3081 22376 bytes
SHA-256: 0dd0f52ae7fab7abe785d07945e732c16266f777efe5e38b5e67d7a68d08b0bb
font_01_sfnt_off000061e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E7 19460 bytes
SHA-256: 89f4df59438818d45a9a18c0e97e60687686638d1cc7745e8dfec3abd76114a9

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