Malicious PDF — malware analysis report

Static analysis result for SHA-256 708857e6ef950559…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 21:37:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 750ef5f6d4bc18fbc56c063cbc480ade SHA-1: f8597875d1352347d475dad830b5d42b17f881e0 SHA-256: 708857e6ef950559fcc84ae361696ee9394cc2a941d07740654e2f936ee8a93a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that point to known malicious redirectors and sites offering game hacks or currency generators. The heuristic firings confirm these links are designed to redirect users to malicious infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

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/i-cant-get-free-spins-coin-master-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-admins_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-free-800-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pubg-uc-free-link_GM1330123889.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-i-get-robux-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-tutorial-xb-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-not-to-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/gaming-cheats-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-without-information_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/boku-no-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-2021-no-offers_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/asshat-level-7-roblox-hack_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_off00002dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD1 22904 bytes
SHA-256: 3745ef9c638af522f2c36b464b7260981af441b2ed691412c1b276849e8610e5
font_01_sfnt_off0000611b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611B 18176 bytes
SHA-256: 3fe879609a2ec62b4de24654327d46adb42693e38bc30f23e18bf10390f0a1c9

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