Malicious PDF — malware analysis report

Static analysis result for SHA-256 d563d0f5ecab1d89…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 14:59:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f16cada74f6394817b3ffa219fa1f310 SHA-1: 176a9d6bafab5260a5a227bf382b89396a929f1a SHA-256: d563d0f5ecab1d899c0b5cfb3a1fb29311e3721f228078bea61d8ed73c7bd593
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL, reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the primary attack pattern involves social engineering to trick users into visiting a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/hack-coin-master-app-game-hack PDF link annotation
    • http://library.stikessuakainsan.ac.id/repository/roblox-meep-city-how-to-get-free-coins_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/edit-roblox-game-code-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/omg-free-robuxnet16_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/does-pubg-uc-generator-work_GM1330123889.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/quiero-ser-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/real-roblox-hacks-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/hacks-on-roblox-grand-theft-auto_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-military-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/hack-richest-roblox-account-deleted_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/money-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/clover-online-roblox-gui-hack_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_002_off00003034.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3034 23308 bytes
SHA-256: c652f86d2f1cb7f74bf240fecd080523ce913ed9ea7b586303bbc23214fd0e2e
font_01_sfnt_off00006492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6492 18180 bytes
SHA-256: ef8ccdc9f548d969a7b2ffa530b5dbe297edb5428ac09ad2e23710a4114dac37

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