Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab927050e8b3bc8b…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 01:03:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: eb5701c8792fa85eabb76e625b984b89 SHA-1: 4aea5e28e3196de2930dab8d4c7546bfadb55ebf SHA-256: ab927050e8b3bc8b0cf18bde3c8a39c06f7daec21e5a562ea1d5edc88a2dd705
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous external links, many of which point to other PDF files, suggesting a link farm or redirection scheme. The document body and extracted URLs explicitly mention 'free Robux' and 'hacks', indicating a lure for users interested in such topics. The presence of a 'password-protected archive handoff' heuristic suggests that the linked content may be an encrypted payload, further reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.tw/app/431946152/free-robux-websites-2021-game-hack PDF link annotation
    • https://library.fdk.ac.id/repository/noclip-cheat-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-free-download-ps3_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/hack-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-gravity-coil-free-in-any-roblox-game_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-account-login-and-password-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-and-tix-place_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-noclip-in-roblox-cheat-engine-67-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-websites-that-actually-work_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_off00002f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6D 22996 bytes
SHA-256: 4b41824c82532dc70a904ab070f693fb87c66545d2f05ad5eead51e8b6000742
font_01_sfnt_off00006327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6327 19540 bytes
SHA-256: 7dbc8426627c63cb62956a50d2295124057d24afa4e6276b198320b3de5f5879

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