Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac9c4b6959e8056…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 19:17:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 208ade4e98e3ce1e630fb809efaf7500 SHA-1: 71585651c6918eaaebae8c80947d410749eeb232 SHA-256: 5ac9c4b6959e8056b6574492b0cfb161618c21157894dd6d6299a112bf703242
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector, masquerading as a game hack generator. The document body and heuristics indicate a lure for free game currency, likely to trick users into visiting the malicious URL. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link within the document.

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-coins-and-free-spins-coin-master-2021-game-hack In PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hack-roblox-script-no-viros_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-game-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/rone-space-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-robux-free-on-ipad_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-scripts-for-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-phantom-forces-pepsis-aimbot-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/comment-hacker-sur-roblox-pc_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-unlimited-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-no-human-verification-2021-or-survey-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-currency-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-admin-tool-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-hack-2021-free_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_off00003095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3095 22796 bytes
SHA-256: 8b5050c35ae69c5b99ff3d79c5d7af70c83b9a8e851268a4986928dbd9aed935
font_01_sfnt_off000063b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B1 18752 bytes
SHA-256: 2808497b37fc1d4f34a1fffc3dd5e81983cd3403e98677a9ba5497e95ebc42c8

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