Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db72e2b9935be96…

MALICIOUS

PDF

37.8 KB Created: 2021-07-05 09:07:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2f4d77f001774c3eea061c20421f1594 SHA-1: 1a8330b89a5cebbb757bb771527ce42790968b47 SHA-256: 5db72e2b9935be96b6aa46d385a3a6b518adf9da72fbe1a7f43160518c799438
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to malicious redirector infrastructure. The embedded URLs, such as http://netcdn.tw/app/431946152/how-to-hack-into-any-roblox-account-2021-game-hack, are associated with known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.tw/app/431946152/how-to-hack-into-any-roblox-account-2021-game-hack In PDF document text
    • http://pspmrsmbpj.com/opac/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/hacks-para-roblox-para-tener-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/real-free-tix-and-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/hack-de-robux-2021-gratis_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-jailbreak-admin-hack_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-dominus-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/robux-hack-very-easy_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_off00003b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B0E 22552 bytes
SHA-256: 1daff67f00e2c2424a02a165effd6a52674e99cbacf621488c75265dfe15240e
font_01_sfnt_off00006d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D60 19460 bytes
SHA-256: db6e89ca3a0eee65cc8df915c3f2085e62c91fceb621eae44ed2f702d1f89c38

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