Malicious PDF — malware analysis report

Static analysis result for SHA-256 572b0ac0a33ebbb3…

MALICIOUS

PDF

34.4 KB Created: 2021-06-28 03:05:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 394e44f999d035ba4183fa1d0279f360 SHA-1: d0a0c19713bdadb6d89dcd3b4229bffe95688d53 SHA-256: 572b0ac0a33ebbb35ae7f2597b38d3a744801a4d6667f8915edb8da274540259
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free Robux' and game hacks to lure victims. The primary malicious URL identified is http://netcdn.co/app/431946152/free-robux-100-works-fast-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs reinforce this lure, suggesting the PDF is designed to lead users to potentially malicious websites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-robux-100-works-fast-game-hack In PDF document text
    • http://library.imz.or.id/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-the-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-how-to-get-robux-for-free-2021-no-inspect_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-roblox-sigh-in_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/tiktok-free-credit-card_GM835599320.pdfIn PDF document text
    • http://library.imz.or.id/repository/hack-client-roblox-may-2021-asshurt_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/marshmello-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/tiktok-free-download-for-pc-windows-7_GM835599320.pdfIn PDF document text
    • http://library.imz.or.id/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-roblox-like-game_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-pets-in-adopt-me-roblox_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_off00002f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F24 22084 bytes
SHA-256: 963e5f11436dd7cc5f52f00db90537d5db929cd648b4adc2db4ce4f78f2d5110
font_01_sfnt_off00006022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 19464 bytes
SHA-256: a4447590f3658fcdd977b6047e000f4bbc49325bd0a70521c36d4805bfa05d01