Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30c8fbca0fa2be6…

MALICIOUS

PDF

38.9 KB Created: 2020-04-10 01:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c375eb720d57148b643d2802414f8b31 SHA-1: 3df215c8531ed7ec62d390222eb888f47a6f8108 SHA-256: c30c8fbca0fa2be64f4efe9fe856f550f25809c9c12aafd22a3d7f3bac6b1c3d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which are numerically or generically named and hosted on unrelated domains, indicating a link farm for SEO manipulation or to host malicious content. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a lure to a document or page that is likely malicious, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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 http://dusd-cte.net/uploads/1/3/0/6/130604255/130604255.html#manual+del+ingeniero+civil+cuarta+edicion
    • http://shannanstanciuforschoolboard.com/uploads/1/3/1/3/131381151/76674674e.pdf
    • http://cannabis-bee.com/uploads/1/3/0/8/130814921/xifebupuko_puwopu.pdf
    • http://globalfamilymedicine.net/uploads/1/3/0/5/130546432/pogizulotekuge-gojonepitob.pdf
    • http://dcranes.com/uploads/1/3/1/4/131483307/fc57975.pdf
    • http://inspirebartlesville.com/uploads/1/3/0/7/130776641/f0f0f364742967.pdf
    • http://inyago.org/uploads/1/3/1/3/131383770/5370471.pdf
    • http://raketsiens.com/uploads/1/3/0/7/130739132/joxomuvazi_xelurejafufe_podezu.pdf
    • http://thepalmspringsinn.com/uploads/1/3/0/3/130323290/9796301.pdf
    • http://nqnsdc.com/uploads/1/3/0/6/130605084/3291022.pdf
    • http://gotbeanpie.com/uploads/1/3/0/3/130379332/nigixipepumeto-korese-dogit-xozisifofi.pdf
    • http://easthamptonmusic.com/uploads/1/3/0/7/130775186/b179215c9.pdf
    • http://carnivalvending.net/uploads/1/3/0/6/130604529/c3b480069c74.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642d.bin
8753c544c4a26188940203a299ed766dd496d56df1b980b4ff5a7ad42e5449dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 9084 bytes
font_01_sfnt_off000084d1.bin
78116880e9c902c31767bfa12a9ff84ada309181a52ab1aa29cdf6fbfe115b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D1 2600 bytes

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