Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae78cce7cc978db…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 17:28:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9860e93427dc96d9337695a88ade0b03 SHA-1: 84ffcc14ff279fbdcaa665791ebcf7a8c5709624 SHA-256: cae78cce7cc978dbb8f20c88060258814959a168cfc933f42b38a63c933ada4e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/406889139/coin-master-support-game-hack. This redirector is associated with 'free generator / game hack' lures, indicating a social engineering attempt to trick users into visiting potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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-support-game-hack In PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/blueberry-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/hack-robux-ios-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/roblox-vh2-credit-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/roblox-free-followers_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/roblox-meep-city-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5bojonegoro.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_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_off0000346a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x346A 22664 bytes
SHA-256: 3fe09fb6c21899d033965b71cde01d2fb90769d2cd252f0e5a3bde1d423e64ae
font_01_sfnt_off000066cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CC 18152 bytes
SHA-256: 8a7ca81e6782867671c5d30d69d8887df81aa78f66bc52c9d916217fc2f60911

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