Malicious PDF — malware analysis report

Static analysis result for SHA-256 235c1f0620780685…

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 12:19:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 816d7c179611d5496b75bdb739b68904 SHA-1: 7f008ead1c382e2c04b2020efa26e1dfddf0f62d SHA-256: 235c1f0620780685a34854f8952cc4dbb5585daec2b35758a745dbb12e58dbc3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many of which are structured as SEO-friendly slugs pointing to other PDF files, suggesting a link farm designed to lure users with promises of game hacks and free codes. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a call-to-action button further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/479516143/minecraft-java-edition-redeem-code-free-2021-game-hack
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/roblox-hack-app_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-daily-spins-and-coins_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/robux-win_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/card-hack-in-coin-master_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/more-robux_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-spin-coin-master-today_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/static-moonactive_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-spin-blogspot_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-get-more-robux_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-spin-codes-coin-master_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/minecraft-free-download-iphone_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e4a.bin
4febc7a1207148fa00e5d4c98f4a0d3361bc4e00b9adf66591aef5da86fd059f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E4A 27200 bytes
font_01_sfnt_off00008bdd.bin
3e84327372ede1fb0dd75240746e2dc46639f78069d280fe972667d8e0b4261e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDD 18824 bytes

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