Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ffcb08a24012a7…

MALICIOUS

PDF

43.0 KB Created: 2021-06-03 09:53:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4df5b0efe8c3c93ecc85ae308f9e0ddc SHA-1: 9410030ae0f98ed4b0cde9d8e1e3afcc79623820 SHA-256: b2ffcb08a24012a7f23fa15385e9a7cd47c6c0adc5e6febd2541ea913a3e4b14
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to direct the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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 https://netcdn.online/app/431946152/get-free-robux-com-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/spin-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-fun-hack-online_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_off00004cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CCA 25296 bytes
SHA-256: b485a4afff55895f2703e93381b967b12953e4f1084bd9bcd714804eafa2bc5a
font_01_sfnt_off000084f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F1 18376 bytes
SHA-256: 2d8882c6a342abc4889e46f94bfee9f8cbf5538b2f5dc41d172000db9622f481

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