Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2906af7bfbd53af…

MALICIOUS

PDF

32.8 KB Created: 2021-07-03 14:38:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8e7235fee1edadb46438688c6074b61b SHA-1: d9d6073aeddd67f381d4e7b38fdd75ba22832b07 SHA-256: e2906af7bfbd53afb1059bd0234877428120ddf23383d6e16c6cc9fd3cef27dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, directing users to a known malicious redirector. The embedded URL, http://netcdn.tw/app/406889139/coin-master-hack-8-ball-pool-game-hack, is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit user interest in free game items to lead them to potentially harmful content.

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/406889139/coin-master-hack-8-ball-pool-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-android-no-survey_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/cheat-engine-undetected-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-cheats-to-get-2021-robux-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-cheats-for-robux-xbox-one_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/unlimited-robux-hack-download-android_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-money-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pastebin-com-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacks-for-roblox-noclip_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/rs-free-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-meme-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/earn-free-robux-online-android_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-page_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-jailbreak-exploits_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/como-ganar-robux-en-roblox-sin-hacks_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/dantdm-shirt-roblox-free_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_off00002b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B3B 22388 bytes
SHA-256: 411b9c77b549429b0ed9be50e20d0ef55ed725ac897b0b75bf1fae96a3c75078
font_01_sfnt_off00005cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDA 18656 bytes
SHA-256: 9cc3a0a753a325654d75dca011d50bcc08942e96fa930538f944fba4de9b9fc3

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