Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2315db6ecbf472…

MALICIOUS

PDF

42.0 KB Created: 2021-05-10 22:09:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 73cf5169bc70da13721dcf818a472266 SHA-1: d22eeb65f0ff19f3a47830801dc1cead8dd3bf8e SHA-256: dc2315db6ecbf4725dc32ce0e42922973c41137724c0612d50c5593a0d6974ac
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 cheats. The primary malicious URL identified is https://netcdn.xyz/app/406889139/cheats-for-coin-master-game-hack. The presence of a 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 document's structure and embedded URLs strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/cheats-for-coin-master-game-hack In PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-free_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-2021-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_off00004ab9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB9 24616 bytes
SHA-256: 9ac40eada9a2bc1eea83b01cfb0403a1a5a60b351a57516235e2de2c2ff686a6
font_01_sfnt_off0000834e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834E 17876 bytes
SHA-256: 503fe8d746beae52c5eef18798c5d93272f0ad11156ff4c57f17f4a0b53681c9

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