Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f487ff29686cab…

MALICIOUS

PDF

45.8 KB Created: 2021-05-16 15:12:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 68ed9d77934e81d0607f5c91dd1d5601 SHA-1: 257a554e6d6a3c295977979f58f115954c60610b SHA-256: b9f487ff29686cab5ced9bbe692d6ee2668dbcb55db3bc44b3b39cc929664ca2
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 https://netcdn.xyz/app/431946152/how-to-change-your-username-in-roblox-for-free-game-hack PDF link annotation
    • http://seniornetwanganui.org.nz/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-monster_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/give-free-robux_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_off00004cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB7 27712 bytes
SHA-256: b0458af3be67e97c8bd9e65640c189f5fe5ff19144a79130f86e1c458b856ee7
font_01_sfnt_off00008d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D84 19540 bytes
SHA-256: 47934da0ee3f947cf015c12c60a39e8e7f45bd5e58593390266dea94dc2cb6c6

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