Malicious PDF — malware analysis report

Static analysis result for SHA-256 6853792611ed2f43…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 22:34:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6dfe845a1e0a36a03170351b95bd1441 SHA-1: 0e89f6457ab73f21edc2e20b8c4ec27a86c4d904 SHA-256: 6853792611ed2f437a4da5db61a6253992c2ca4935251f76ef65264279d7c0cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure URL is http://netcdn.tw/app/479516143/client-minecraft-game-hack, which is associated with redirector activity. The document's structure and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for malware distribution or credential harvesting.

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/479516143/client-minecraft-game-hack In PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/a-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-hack-stuff-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-get-free-robux-2021-june_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-get-a-dominus-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-comment-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/how-to-hack-roblox-accounts-2021-july_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-granny-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/roblox-fling-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/dupe-tool-hack-roblox-noo-virus_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/como-conseguir-robux-gratis-en-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://perpus.ft.undip.ac.id/pustaka/repository/daily-coin-master-free-spin-link_GM406889139.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_off0000310b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310B 22688 bytes
SHA-256: efe00cb98f04aae6aef0dd8f4f181f1607dc1cb0527a5dfe3af3084e46dd9ecb
font_01_sfnt_off000063c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C5 17928 bytes
SHA-256: 03df11e40c57bdfec20383231f5ff565f7aa00441a2543591869b0e9fd2a6fac

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