Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa0c056750d46af…

MALICIOUS

PDF

41.7 KB Created: 2021-05-13 23:40:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2c76e17bce22286c5dec113192acbe75 SHA-1: a9c04f47cacc1102306e9b80202680c247f54939 SHA-256: 4aa0c056750d46afc91a9da10299bd140ec779b76180b4984fc046758450b7ba
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which appear to be part of a link farm designed for SEO manipulation. The primary URL, https://netcdn.xyz/app/406889139/coin-master-attack-block-hack-game-hack, suggests a lure related to game hacking. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a potential for malicious redirection or content delivery, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/406889139/coin-master-attack-block-hack-game-hack
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-links-for-today_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-account-roblox-2021_GM431946152.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-card-hack-apk_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/moonactive-free-spins-2021_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spins-cheats_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/how-to-get-coin-master-card-free_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-without-human-verification-2021_GM431946152.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/how-to-hack-minecraft-pe_GM479516143.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-coins-link_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-for-free_GM431946152.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-download-hack-ios_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-roblox-groups_GM431946152.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spin-codes_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-com-roblox_GM431946152.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spins-link-2021-haktuts_GM406889139.pdf
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/minecraft-windows-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004790.bin
74f7fd27217748fb01be526646479ec601b6ecf4d66e218714432653a6877098		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4790 25684 bytes
font_01_sfnt_off00008191.bin
0ca0a7b3c48285d5504a250c0c9352f2a5009124704ab461b8ccbe1fad4bf069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8191 18008 bytes

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