Malicious PDF — malware analysis report

Static analysis result for SHA-256 836352e45725f989…

MALICIOUS

PDF

49.8 KB Created: 2021-06-03 07:47:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 21b3f2d5468ce54a6af9c2c92901d89e SHA-1: 11220001aa3d1e3758f937bfe7faa647c97463d9 SHA-256: 836352e45725f9893791ead799ddc9c80d8572bf44937a468f7a1f46eeeab2e7
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9796

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/free-robux-just-enter-username-and-password-game-hack.
  • 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/free-robux-just-enter-username-and-password-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005419.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5419 26072 bytes
SHA-256: 65da4028640bad1067297ed06eaccd4e5bac7dd7d72530bf070e62c20128bc73
font_01_sfnt_off00008f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F42 3992 bytes
SHA-256: ca9cd4f0345d8483bda3e807ea4e40142b8bf70d3672af2d6a5dd7953d1a2391
font_02_sfnt_off00009c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C69 19448 bytes
SHA-256: 4f9e120e202de6bc84ec177104ad4fa84abe9ff586f44aa7e03787aebbe4e81a

Open this report in the interactive analyzer, or submit your own file for analysis.