Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ad9d90721f5971…

MALICIOUS

PDF

32.9 KB Created: 2021-07-03 16:42:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 145751964809ccc125fa8a28e31bb4d6 SHA-1: 87ef17308df93b62dd13ee1ad492d89dfae7d997 SHA-256: 68ad9d90721f597128e062a876e116c82e11f8c64a4a001ea8461e9e20ed19c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics indicate a lure for free game currency or hacks, directing users to potentially malicious sites. The primary link, http://netcdn.tw/app/431946152/how-to-get-free-robux-on-pc-game-hack, is flagged as a malicious redirector, suggesting it leads to further malicious content or downloads.

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/431946152/how-to-get-free-robux-on-pc-game-hack In PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-today-dot-com_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-2021-no-hack-or-survey_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-how-to-get-a-free-face_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-game-hack-kaise-kare_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_off00002b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B75 21872 bytes
SHA-256: cb552a276509e4a9d2d05d72ef2370bf0000f2a7f79800f9c8f9ed73d6051ffa
font_01_sfnt_off00005ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA3 19136 bytes
SHA-256: aef8c40112b84489b97b1b1a2bbf6c88e9b8fe4bc85a356f803a45374dab5087

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