Malicious PDF — malware analysis report

Static analysis result for SHA-256 662f2fe132eb8494…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 13:41:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a8d777d934e98ce5a0ebb5f479bd73f5 SHA-1: 227491004f922c73fdd09921074a6a7e79c83094 SHA-256: 662f2fe132eb8494956530cbcd37a3d8e1e1065243210e50a530ae7eef8ee9f1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that lead to pages offering game hacks and free items, indicating a phishing or scam attempt. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of such links were generated, and the ML classifier strongly flagged the document as malicious. The presence of embedded URLs and the document's content strongly suggest a lure for users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-redeem-code-for-coin-master-game-hack
    • http://perpustakaan.sman2bondowoso.sch.id/repository/jailbreak-roblox-hack_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-without-downloading-anything_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/real-free-spins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/wurst-client_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-coins-twitter_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/win-free-robux_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/pubg-uc-avatar-hd_GM1330123889.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-mod_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-games-like-coin-master_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-land-free-robux_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-accounts_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spin-today_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-roblox-glasses_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/games-that-give-you-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053f9.bin
82fdecf1b663ecd16c33688c00771c6e6975f257352f4f70274e52f0473875fd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53F9 25064 bytes
font_01_sfnt_off00008dfe.bin
8e08ca8cea331ef635d4f0d43e9b7f0e55ee5a5b0bb4b3b8f10d73ecaad2eef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFE 18144 bytes

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