Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93eeb718169de64…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 18:54:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e4a65dc83c0af8edd54982ebe2a4aeae SHA-1: 89712fdd74dc5d3ea60d520c9d4cdfc1690378f4 SHA-256: d93eeb718169de64407d3f9c2975dd36b752c92177b572f23a6258f463f1a56a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary URL identified is http://netcdn.tw/app/431946152/how-to-get-free-robux-on-ipad-game-hack, which is associated with a game hack lure. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt to drive traffic to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/431946152/how-to-get-free-robux-on-ipad-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/tiktok-free-book_GM835599320.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-my-hero-release-boku-no-free-code-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-walk-through-walls-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-https-coinms-net_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_off00002e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E03 22336 bytes
SHA-256: 9721aabff1aa7bf11edebbaf14aa066fbcd845702b480f38cc0c7d96cbbe45b4
font_01_sfnt_off00005fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 19336 bytes
SHA-256: 6d1966dedbfa40cd6f3b86a0165a8efd1ff1225966bd53f71ae3281b1191d4bc

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