Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6d85e2d0b61cd4…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 19:46:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 73403bb9d72685ea818ad88cb42cc219 SHA-1: ff88156d8d856f1457897bd73926d479aab7a2d3 SHA-256: ee6d85e2d0b61cd42102ce9509e57f768f3e6b6c2fff0432b75109b18984f3ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that redirect to malicious infrastructure, specifically a link for a 'free generator / game hack'. The ML classifier also flagged this PDF as malicious. The document body contains text and URLs related to game cheats and free currency, indicating a lure to trick users into visiting potentially harmful sites.

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/freespinandcoin-game-hack In PDF document text
    • http://library.umla.ac.id/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-roblox-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-free-co_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_off0000309a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309A 23248 bytes
SHA-256: d5e80759bd8574ee22d34cba95176d0cdfda4a51c1c74c9078681a1f6695163a
font_01_sfnt_off00006548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6548 18244 bytes
SHA-256: 19494bed36003fadbe02431e250c62ef1698fa422030438aed600d934fd3a9e1

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