Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc140ef1235a776…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 12:17:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3409f2f94b60f1f8f4875a8ea67997f3 SHA-1: d04f79542a7fdc0fa4d214cd731d211ede654187 SHA-256: ccc140ef1235a776c0f7c29b1eaf25015699ab2ae6f9ab56676b9fabeadacf05
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 0.9864

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/406889139/coin-master-free-spins-daily-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/cheat-indetectable-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-pokemon-go-accounts-level-30_GM1094591345.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-without-paying_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
stream_004_off000052bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52BF 26284 bytes
SHA-256: e3a730a37527062915c0909a75b3bfb6061dce8d027d1e5067da230c46d870c6
font_01_sfnt_off00008f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F99 18308 bytes
SHA-256: 220bb6194b1ab8a2bb399ca4a862914ac8d15b354bb0df2c737bc67699221dc9

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