Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e1826b973b432c…

MALICIOUS

PDF

35.7 KB Created: 2021-06-20 03:38:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5eccb6ef4011ed134a2bab2f8998b93f SHA-1: b3d40fe5677a8bde53250f73abd0fd0cbfd67abd SHA-256: 43e1826b973b432c493d66009a9efa0ee9174d2ef65ef913c764e80a3b136c7d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a 'Roblox Hack' or 'Free Robux Generator'. The primary link, http://netcdn.co/app/431946152/roblox-hack-2021-get-free-robux-for-android-and-ios-game-hack, redirects to known malicious infrastructure. The document's content and embedded URLs strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful sites.

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/roblox-hack-2021-get-free-robux-for-android-and-ios-game-hack In PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-use-roblox-hacks-multiple-rbx-games_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-pe_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-hack-robux-on-windows_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-how-to-use-cheat-engine-62_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/infinity-gauntlet-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-robux-page_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/22-500-robux-free_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/spiderman-free-roblox-stuf_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-why-are-there-no-free-clothes-reddit_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3339 22188 bytes
SHA-256: 9b8208090d69d431392ff62c3f43b15864c40c327ea1b84ebc144f283d4bae0e
font_01_sfnt_off00006459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 19760 bytes
SHA-256: 195327dffde2af498ba64861d1b13c4c76d09f8332710f891cd46215692d9952

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