Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9cc03a7d4385e5…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 10:30:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b4c4fbda38e68574ca13796fd7400309 SHA-1: 0fc72f3d2dee6a490e8f13686263bc6aedd41110 SHA-256: 2d9cc03a7d4385e52c115284f6cae1b8a0bab156a93d4fbab0ae7f0daae24c02
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and virtual currency, identified as a lure for malicious redirection. The primary link, http://netcdn.co/app/431946152/how-to-get-free-robux-dreamscape-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to potentially harmful content, likely for credential harvesting or further malware delivery.

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.co/app/431946152/how-to-get-free-robux-dreamscape-game-hack In PDF document text
    • http://www.manchieu.vn/upload/editor/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/toolbox-apk_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/luis-coment-robux-free_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-cothes-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-speed-hack-roblox-mac_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-no-card-roblox-card_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-how-to-get-free-items-in-catalog_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/easy-points-gg_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_off00002e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6A 22236 bytes
SHA-256: e16a63fa11ccf52c9557c3566902ecd8454d77dc00d9e94081cfd312a3e13988
font_01_sfnt_off00005f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F93 19588 bytes
SHA-256: d5f805437dc9b85330a8dd147b26c43533c65d53d19f42f8a85e7f1213812703

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