Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31fe99642aa3ceb…

MALICIOUS

PDF

50.5 KB Created: 2021-06-03 14:59:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9b7f851ae286731f123f74067934c392 SHA-1: c82925d937ca25c24d87854565f8fedc0a82ef2a SHA-256: e31fe99642aa3cebb681f908697125f5d8c880fef81443c4eaa00eea54a83b91
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links and a visual download button, strongly suggesting a lure to a malicious website or further content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a link farm heuristic indicates a large number of external links, likely for SEO manipulation to drive traffic to scam or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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/479516143/how-to-download-minecraft-for-free-on-android-game-hack PDF link annotation
    • http://opac.stiesa.ac.id/repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/can-you-go-to-jail-for-downloading-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000554f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x554F 24764 bytes
SHA-256: 6b4d1a10c38a34a488d1dc6859aad167eb887ec36c8e3ea0d11bfc85da387473
font_01_sfnt_off00008e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E02 3020 bytes
SHA-256: eedce20c19bed174ebe453a0c0095ca54ef1c0cf763914f699a20348cea05fc2
font_02_sfnt_off00009856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9856 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000a267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA267 18292 bytes
SHA-256: c2ea3371fa9b25632cddb8e0de3a5c7839f7d40247368be9d12018d9986f023b

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