Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d53b792d77d06c6…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 07:18:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2e4dc364b6238ecf5708832754066ca7 SHA-1: 1013c3c5570080f1f89274fac29e436cd13184c4 SHA-256: 5d53b792d77d06c6be06694542d1e3f1ef058b74fe5fac3c0bbb0a5c0eae7d0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The presence of a visual download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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/coin-master-spin-ml-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/instantrobux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-scripts-for-ipad_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/most-popular-roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-download-roblox-intros_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-knife-capsules-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pubg-uc-center_GM1330123889.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-cheats-to-get-free-builders-club_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-master-coin-pc_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_off00002ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED9 22356 bytes
SHA-256: fde1ec8aba2dbf4d63434d312959f424d70bef45dbb921ddc0ae93158799a604
font_01_sfnt_off00006099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6099 18084 bytes
SHA-256: d0f847134178a2f8fffac17547c1a4781e9d989e6f7119da2e268a8362f52d9d

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