Malicious PDF — malware analysis report

Static analysis result for SHA-256 25066ae414f1272f…

MALICIOUS

PDF

46.5 KB Created: 2021-06-04 04:46:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ae4eaa06ef05d7b384eefdc1999daf32 SHA-1: 2bb9f55c75e4c1661d97b6c6b9943bda5ac2edda SHA-256: 25066ae414f1272ff7124ba10bfa1e368dfda5cde1f89e3b9dd39deaf6038c25
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9832

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/431946152/how-to-hack-any-account-on-roblox-2021-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-gang_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_off00005055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5055 27392 bytes
SHA-256: aa5125e671356c137dda5a678a40fab37c3dc68b61581e0a921773be93c7d22e
font_01_sfnt_off0000907e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907E 19172 bytes
SHA-256: 0a7e104d5ecfc95001c2fec9af84766da75c2f23ece79c6ff95580c56c9070bb

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