Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1c1f9c0d54d3db…

MALICIOUS

PDF

36.3 KB Created: 2021-07-06 13:01:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9eb8d7227a07f84b8382cd3771061b77 SHA-1: a9dde757ae8d0ba1f3b69280cba891046516873a SHA-256: 7a1c1f9c0d54d3db71cf21ba406371082b7c99f236492a31ed4929d4c3f08123
62 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a visual download button, strongly suggesting a lure to download a malicious payload. The ML classifier also flagged this document as malicious with high confidence. The primary URL, http://netcdn.tw/app/431946152/login-robux-game-hack, appears to be the intended destination for the malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/login-robux-game-hack
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/mage-free-hack-roblox_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/how-to-get-free-robux-that-really-works_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-make-a-cool-free-roblox-avatar_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-speed-hack-on-roblox-with-cheat-engine_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/tiktok-free-likes-app_GM835599320.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/download-synapse-roblox-hack-free_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/roblox-free-promo-codes-2021_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-robux-without-downloading-apps_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-hack-apk-april-12-2021_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-robux-sites-2021_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/my-minecraft-account-was-hacked_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/campingvip-server-hacks-roblox_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-robux-without-downloading-anything_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/pokemon-go-free-spoofing_GM1094591345.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-robux-on-console_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/where-tiktok-free-view-iphone-11_GM835599320.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/is-minecraft-java-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000364e.bin
2aacf7f7cba31cb77a5b8ad572bc63a804f1fd2a523173ec34aa443c85cc2fe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x364E 23040 bytes
font_01_sfnt_off000069fe.bin
0ae16703f09f73d315d66226a0dafe23a46f740b34e9acc2d6474ce0ffb88923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FE 18672 bytes

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