Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b86bf000299de3…

MALICIOUS

PDF

34.3 KB Created: 2021-06-28 06:59:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 08135d5bd712222f6f92ae60728f9354 SHA-1: d6029e1894cf3370f6dbd0b27c7b6adba19e4196 SHA-256: 18b86bf000299de3c2812ae39b042aab28569e1f48e52b133cec6d32f02c8767
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/all-free-items-on-roblox-2021-game-hack PDF link annotation
    • https://opac.heritagejkt.org/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/freerubux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-song-code-for-cheat-codes_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-script_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-hack-roblox-on-ipad-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-apk-mod-coin-master_GM406889139.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_off00002e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E71 22292 bytes
SHA-256: 0d18cc500afdeee4a8c32ddc75342f573182aac4ee8f4ecc571b865ce17048cd
font_01_sfnt_off00005fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE4 19416 bytes
SHA-256: d6bef19d1df61f46f4f19318852e317e6e84f3dfd41cfb64bc1283280896f167

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