Malicious PDF — malware analysis report

Static analysis result for SHA-256 809acecf53bd8d31…

MALICIOUS

PDF

49.1 KB Created: 2021-05-19 23:37:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d15be09af01f7646df994e4725759b5d SHA-1: a6a9c3badf583e8f48b1d5675c196b227549255f SHA-256: 809acecf53bd8d318b54ee6469bc16f9d36a763dddef8156cbe061f1e710c351
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm or content-scraping operation. The document body and extracted URLs indicate a lure for free Robux or game hacks, a common social engineering tactic. The presence of a password archive lure heuristic suggests the content may be intended to bypass security scanning by encrypting a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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 https://netcdn.xyz/app/431946152/apps-to-get-free-robux-game-hack
    • https://lib-stie.yai.ac.id/repository/minecraft-server-hacks_GM479516143.pdf
    • https://lib-stie.yai.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • https://lib-stie.yai.ac.id/repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdf
    • https://lib-stie.yai.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdf
    • https://lib-stie.yai.ac.id/repository/free-robux-website_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/krnl-roblox_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdf
    • https://lib-stie.yai.ac.id/repository/minecraft-hacked-client_GM479516143.pdf
    • https://lib-stie.yai.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/game-give-free-robux_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/robux-scam_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a6.bin
ebe95dd81f9d13a3f3407949c88b4444350cf0862cb0d44d299f981a7720476f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A6 26196 bytes
font_01_sfnt_off000085d1.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D1 2940 bytes
font_02_sfnt_off00008fdc.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDC 5696 bytes
font_03_sfnt_off00009cee.bin
b4e5860ebf2343f9b18b94d86a305cbc7e8ebd2f2a6bfe7ceeed88b67548d8bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEE 18292 bytes

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