Malicious PDF — malware analysis report

Static analysis result for SHA-256 e592d963d7975562…

MALICIOUS

PDF

50.3 KB Created: 2021-06-02 20:46:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5ffc3b346cbab3c3ff1f8db173e603a0 SHA-1: e9f14a004d334c56da8ac29b70ade6583b0749ee SHA-256: e592d963d79755625952f3a2bd758b200fda85a78a019154276a50d8deeb213b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as generators for game currency and hacks. The primary redirector URL is https://netcdn.xyz/app/431946152/free-roblox-account-generator-with-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.xyz/app/431946152/free-roblox-account-generator-with-robux-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-through-walls-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pubg-74-uc_GM1330123889.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52B7 28076 bytes
SHA-256: 2f7de781412ab09d8b733e07895470dc5ad5d2591ccbeb3470b148f87689a525
font_01_sfnt_off0000930a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x930A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA01C 18904 bytes
SHA-256: 06a902868c32af112883abff20f592e24446bf50c8beb812785bd7da153bc537

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