Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eae6c48cd5e4bf9…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 14:14:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 82f5952955021d65d2dbc245ef3f1245 SHA-1: 0e071229409cbf19394164df884d29fd43d9eda4 SHA-256: 2eae6c48cd5e4bf9fbe8cb37122a64e49d8870560da34c0c953cf7f0988a3ca7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free robux'. The primary lure URL is http://netcdn.tw/app/406889139/free-spin-coin-master-hack-2021-game-hack, which is flagged as a malicious redirector. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or scam attempt designed to trick users into visiting malicious 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.tw/app/406889139/free-spin-coin-master-hack-2021-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com//repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-hack-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/unused-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/bl4z3-games-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-make-script-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/complete-this-obey-to-get-free-robux_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_off0000307c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307C 22780 bytes
SHA-256: 77a194fe0259a3a2fe9fe58700176eda35bc4993600f6c5bd045678db2be9e1c
font_01_sfnt_off00006386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6386 18748 bytes
SHA-256: 09e9522e43d1493e395b46c6e396a2d39f5a619d28468af8eceb278664062f1f

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