Malicious PDF — malware analysis report

Static analysis result for SHA-256 380a36839ec7ba89…

MALICIOUS

PDF

32.0 KB Created: 2021-07-21 22:21:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 523e8714b2d33468d174bd9ebd1caf4f SHA-1: ed7bee9a2ad57f669843662d17161172e20fd48e SHA-256: 380a36839ec7ba89dfdbc32653b372f18c8e55ece0cb854dba7cb97e3869d716
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'generators' to lure victims. The primary redirector URL is http://netcdn.tw/app/479516143/how-do-i-get-minecraft-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content or further exploit stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/479516143/how-do-i-get-minecraft-for-free-game-hack In PDF document text
    • http://artindex.pro/images/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://artindex.pro/images/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://artindex.pro/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://artindex.pro/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://artindex.pro/images/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://artindex.pro/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://artindex.pro/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://artindex.pro/images/free-robux-gift-card-codes-2021_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_off00002b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B38 22096 bytes
SHA-256: 220b68472bf78da8438c4c4f7b5370401f795d1e0a17b96e09ec860de3f94e1a
font_01_sfnt_off00005bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCA 18044 bytes
SHA-256: 8adf8c493cf7b961d8151eaa7b2e31490a9d93b7fc863b831128d5e31b20427f

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