Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3276c72888ca4c3…

MALICIOUS

PDF

43.1 KB Created: 2021-05-20 00:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e9512e85df9daa935352c1fc39df9f5d SHA-1: 9e0f1e0bf803bb67eaaae6d4484e7b593d052ba5 SHA-256: e3276c72888ca4c30df2b0117992a0d0ce2b7149bf3047ea2b0dd11c97bc61af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' lure further supports a malicious intent. While no scripts were directly extracted, the PDF structure and embedded links indicate a social engineering attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/claim-roblox-game-hack In PDF document text
    • http://mohacad.hu/images/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-gang_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://mohacad.hu/images/pokemon-go-free-incubator_GM1094591345.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_off000049c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C9 26088 bytes
SHA-256: b2b6e6bdec83c7e5285f4d570f96915873963dc1ecd0d4793ed3d934855307c1
font_01_sfnt_off000085d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D1 18392 bytes
SHA-256: fe9b7128cb0eee1ae035507d7f39c681ea20029560c6d7ed549175e97334f950

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