PDF static analysis report

Static analysis result for SHA-256 3cdf91bc5c3e9f3e…

SUSPICIOUS

PDF

34.7 KB Created: 2021-06-26 04:40:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 76c79d1815292a79d8f99ac47aba2728 SHA-1: 8d477b9027fe59ab86922259f502b56692c25c86 SHA-256: 3cdf91bc5c3e9f3efe95397061553be2d06a35f4a7f57ba7b7bc36af38e8a529
42 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded URLs and text that promote game hacks, specifically for 'Roblox Zombie Rush'. The primary URL, http://netcdn.co/app/431946152/roblox-zombie-rush-hacks-game-hack, is likely a lure to download a malicious application. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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.co/app/431946152/roblox-zombie-rush-hacks-game-hack PDF link annotation
    • https://edu.kyst.com.tw/image/data/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/cheat-engine-roblox-noclip_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-how-to-get-every-emote-free_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-client_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-game-download-pc-free_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-bux-free_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_off00003151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3151 21856 bytes
SHA-256: cfedca516cf5aa1ee40466262de7b555012df72b51401eb61aea6a4433b353d4
font_01_sfnt_off000061aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AA 19436 bytes
SHA-256: 94499d088878a51ee8b1e62ddfeaa02a5f532b24e44add0b4ea82c09d9f425d9