Malicious PDF — malware analysis report

Static analysis result for SHA-256 677d45fa9cf36b77…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 11:21:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8518e36978ee6c16542fd3dc416cd05d SHA-1: ff0fd3cd885986d19d182baa2392fbf1c869f8f6 SHA-256: 677d45fa9cf36b77a7e39e4327da610f8aab6388ee1ef55b4033778a3dafd499
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising game hacks and cheats. The primary lure appears to be a 'Coin Master Connection Lost Hack' which directs users to a malicious URL. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence suggest a malicious intent to redirect users to potentially harmful content or further stages of an attack.

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-connection-lost-hack-game-hack In PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/roblox-hack-version-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/cheat-engine-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-to-get-a-free-monster-truck-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/jailbreak-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-on-the-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/pixies-gigantic-coin-master-free-spins-and-coins_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
stream_002_off0000352f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x352F 23348 bytes
SHA-256: 9c5d632bb1759d482510394b51d85baeb519ff73df3724ce38e8a638c92dc707
font_01_sfnt_off00006a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A03 18004 bytes
SHA-256: 58988067efd886dc36456b46fe3225c93ea55016c7ce0119dda3afc1f388b935

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