Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d41c9d89d54ddb…

MALICIOUS

PDF

32.8 KB Created: 2020-06-01 00:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2dc72e946476e0bdd58d89f98a6dd17 SHA-1: 9f05b216a50f2f1d3f03bedb4b8279964ffead17 SHA-256: 91d41c9d89d54ddbac8fc1531823b570e38a2cf787d297157c1d2cdc62caf749
72 Risk Score

Malware Insights

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

The PDF document contains a heuristic indicating a link farm and an embedded URI pointing to 'andreafarmeraprnllc.com'. The document body, though heavily obfuscated, contains references to 'Vibosoft android mobile manager' and the malicious URL, suggesting a lure to download or interact with malicious content. The presence of a 'download button' heuristic further supports this attack pattern.

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 http://andreafarmeraprnllc.com/uploads/1/3/0/5/130539269/130539269.html#vibosoft+android+mobile+manager
    • https://mokelim.files.wordpress.com/2020/05/xivezibusonokasut.pdf
    • https://tojugodusino.files.wordpress.com/2020/05/guzomuzol.pdf
    • https://lazifewe.files.wordpress.com/2020/05/19411083338.pdf
    • https://duzawexosusa.files.wordpress.com/2020/05/xifexeninijavodo.pdf
    • https://purekekimol.files.wordpress.com/2020/06/38277015549.pdf
    • https://vusipubaze.files.wordpress.com/2020/05/20972468336.pdf
    • https://zifufenusudo.files.wordpress.com/2020/05/21397322218.pdf
    • https://kegedepubu.files.wordpress.com/2020/05/ruxaro.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000552d.bin
8e829376a04d027f87a67ad484a3b29331004b2bbae3e740e4aa50256f8c4966		 pdf-font-stream PDF embedded font (sfnt) at offset 0x552D 10328 bytes

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