Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4743395167291f1…

MALICIOUS

PDF

31.8 KB Created: 2021-07-05 10:43:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1a79a8011d90d5b577655705aa1ca773 SHA-1: 2696d605b5c8949c39ecda8d13183699744cc265 SHA-256: a4743395167291f1ac1f3485cd2fc9f7771c0db2538a981da1f75617da49d2b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a lure related to free game items and hacks, directing users to a malicious redirector. The document body contains multiple URLs that are either part of the initial lure or lead to other malicious PDFs hosted on similar domains. The primary redirector URL is http://netcdn.tw/app/479516143/how-to-get-minecraft-java-edition-for-free-game-hack, which is associated with known malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-to-get-minecraft-java-edition-for-free-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-any-item-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/rbx-sites_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-phish_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-death-sound-effect_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/www-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hack-para-tener-robux-gratis-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-anyones-account-on-roblox_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_off00002a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1B 21476 bytes
SHA-256: 886de45023be80ccdb5e34d1f70bd84bd29af8e71785e70302e5cb4a9d9dee60
font_01_sfnt_off000058f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F3 18616 bytes
SHA-256: 898c1194d8bc2e07c8eea0e55d341ba96b7c540544d1d7788b8098c3180d6029

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