Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b43807e9778e82e…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 00:53:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d4ff5d8ad10f28b05eb477511fff5f92 SHA-1: a9ba95082bf346e4f66a9886312e6bcc1da15a15 SHA-256: 7b43807e9778e82ec45d78d80c7d78b166312ff899b02f5389d8a2647eec427a
122 Risk Score

Malware Insights

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

This PDF document contains multiple links to external resources, many of which are algorithmically generated and point to potentially malicious content such as hacking tools. The presence of a visual download button lure and instructions for password-protected archives further suggest a malicious intent to trick users into downloading unwanted software. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.tw/app/431946152/roblox-hack-tool-download-android-game-hack
    • http://akbidprimahusada.ac.id/elibrary//repository/minecraft-pe-hack-client-2021_GM479516143.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/free-robux-no-download_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-link-for-spins_GM406889139.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-cards-free_GM406889139.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-400-spin-link_GM406889139.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/hack-into-anyones-roblox-account-to-steal-their-robux_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/roblox-hack-scripts-level-7_GM431946152.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/free-robux-finish-obby-no-password_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-games-with-free-boombox_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-without-survey-or-verification_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/get-free-spins-on-coin-master_GM406889139.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/black-t-shirt-free-roblox-tshirt_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-villages_GM406889139.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/rape-simulator_GM431946152.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/minecraft-bedrock-free_GM479516143.pdf
    • http://akbidprimahusada.ac.id/elibrary/repository/free-coin-spin_GM406889139.pdf
    • http://akbidprimahusada.ac.id/elibrary//repository/wurst_GM479516143.pdf
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-give-other-people-free-roblox-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005195.bin
47edade2602ecb4075cc535061a576812600590f362e71f3552397b2149485fe		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5195 26444 bytes
font_01_sfnt_off00008e6c.bin
ccb47e5c3b8b48c25f6aac1863c201cc43d3399cbb8f2bb74c045d51db774335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6C 18808 bytes

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