Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22314a74a5f777e…

MALICIOUS

PDF

37.1 KB Created: 2021-07-06 04:20:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a461e888482cfefcf44eac0dbf8b3a6d SHA-1: ab2377da19f5da7066ca29b6ffd40e1a3e69ba95 SHA-256: a22314a74a5f777eb4558d6ef0ad94cbb032bdafb996ee7c234b7f2ddc39a80e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that point to known malicious redirectors and potentially malicious content related to game hacks and free in-game currency. The document body and heuristics indicate a lure for users to click these links, which is a common tactic for distributing malware or conducting phishing attacks. The presence of multiple redirector links suggests a coordinated effort to lead users to a malicious destination.

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/406889139/free-coin-and-spin-for-coin-master-game-hack In PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-roblox-accounts-with-obc-and-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-item-in-catalog-roblox_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/glitch-free-robux_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-generator-download-free_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/hacked-roblox-app-ios_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-any-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-no-authentication_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/pubg-uc-image_GM1330123889.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/eazy-was-how-to-hack-into-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/cheat-bubble-gum-simulator-de-roblox_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-100-000-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-robux-no-verification-2021_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_off000039a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39A3 23404 bytes
SHA-256: cad4a22e1292cc35228f12f9980efd97901f6d39e4b3f2dbd98fb5956d4d8e14
font_01_sfnt_off00006e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E81 18348 bytes
SHA-256: 2e7a314d6d80049ca784104c227b58d034e2cad44d3f1c388a0c6c6e6dc8627c

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