Malicious PDF — malware analysis report

Static analysis result for SHA-256 287727edd97ed0a9…

MALICIOUS

PDF

24.7 KB Created: 2021-07-05 17:45:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 760a6c08795177ae7256da6a859b44bb SHA-1: a276948c457a48aeb03333092f27f42f44b30336 SHA-256: 287727edd97ed0a9f1eb864ce028c390a50044eb6e0dd4fbaee0c6fa701b622c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular titles. The primary lure URL is http://netcdn.tw/app/431946152/roblox-free-pets-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely intended to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 3

  • 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.
  • 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/roblox-free-pets-game-hack In PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/wearedevs-roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/how-to-get-admin-commands-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/login-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/pokemon-go-vs-free-fire_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E69 22536 bytes
SHA-256: d6de251ff10a6c95cbadc9064dd3ea0db68b7df57fcaddd94aecea4522a6f7e3

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