Malicious PDF — malware analysis report

Static analysis result for SHA-256 286f9072e15709e5…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 12:03:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 009162ea406f94c2964d3a3f5322f95e SHA-1: 314be85a306752c921a8a50efa1e1d12d5929ad6 SHA-256: 286f9072e15709e51e82b833b06c7a6eb1c619a2df321bd8c685c0deb18c3b9e
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as game-related generators and hacks. The presence of a fake CAPTCHA heuristic suggests an attempt to trick the user into further interaction, likely to download additional payloads or complete a phishing-like process. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/406889139/free-spin-link-in-coin-master-game-game-hack In PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/village-4-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnegeri1mojokerto.sch.id/__statics/gudangsoal/files/sites-to-get-free-robux_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
stream_003_off00004cb5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB5 23748 bytes
SHA-256: 003a120b7bacb70a156a48819f04196bc72850d121322accea3eafe19c54f03f
font_01_sfnt_off000082f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F5 18316 bytes
SHA-256: 83e319b57b25df8003591b2f8cd8f74939fd682d39c72f42c8d3fdd92a1d2569

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