Malicious PDF — malware analysis report

Static analysis result for SHA-256 c915e6cd2a086e14…

MALICIOUS

PDF

35.6 KB Created: 2021-07-09 01:01:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 442d15922fd4f3b4fa221f92e8f6e223 SHA-1: 41cd93e3122067fd486a368ce6269bd3a2fb481c SHA-256: c915e6cd2a086e144fd47fd6ef2be403903680dc9e8ed999590e6aaeae91bba3
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 'game hacks' and 'free generators'. The primary redirector URL identified is http://netcdn.tw/app/406889139/coin-master-hack-mod-apk-download-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a lure to download potentially malicious content or visit further compromised sites, aligning with a phishing or social engineering attack pattern.

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-hack-mod-apk-download-game-hack In PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox-on-android_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/robux-hack_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/roblox-generator-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/who-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-hack-roblox-so-i-can-get-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://elearningmts.pontrenannur.or.id/__statics/gudangsoal/files/hacking-simulator-roblox_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_off00003445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3445 22636 bytes
SHA-256: e7d6224b8e776f0b80fde597fc454a7acc3ee717696085dfb3be536ad6d91509
font_01_sfnt_off000066da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DA 18760 bytes
SHA-256: 8da59bb2b576fb969baa6cece68dec68f192c2005e489f6fb2bd389f048cfd07

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