Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9b6cf063db8b22…

MALICIOUS

PDF

42.5 KB Created: 2020-03-20 04:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4ff56c8e7db952d5a944c3a7b39492fa SHA-1: 8c2ffb4ec07e135cfc72064c27013b2ebab9869e SHA-256: 4c9b6cf063db8b22099a7c8fe629077d4fc49e8830957b84d6ea8eb0a9499b79
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted across numerous domains. This pattern is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious payloads or to artificially inflate search engine rankings. The document body itself is largely garbled, but the presence of the URLs and the 'PDF_SEO_LINK_FARM' heuristic strongly suggest a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

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://theliptease.com/uploads/1/3/0/5/130588532/130588532.html#diccionario+de+terminos+contables+pdf
    • http://magnitocomputers.com/uploads/1/3/0/9/130969237/kasevasuvafive.pdf
    • http://www.conduser.net/uploads/1/3/0/3/130379488/japinipinoloz.pdf
    • http://thebra.org/uploads/1/3/0/4/130477310/4998707.pdf
    • http://www.polishmatters.piastinstitute.org/uploads/1/3/0/7/130775835/5573977.pdf
    • http://maniac-music.com/uploads/1/3/0/3/130313458/4856181.pdf
    • http://elliottheights.com/uploads/1/3/0/9/130969937/ca880a2dec1.pdf
    • http://illinoisbehavioralconsulting.org/uploads/1/3/0/4/130435659/cb3b3.pdf
    • http://sproutingsoulwellness.com/uploads/1/3/0/4/130435862/5b5d81ced820b3.pdf
    • http://sleepytraveler.net/uploads/1/3/0/6/130620283/7179803.pdf
    • http://fortypercentcoaching.com/uploads/1/3/0/5/130590008/ed00b2d7555ea2.pdf
    • http://aztecfinancialcorp11911.com/uploads/1/3/0/6/130621044/jupelotasuwa.pdf
    • http://niagaramedia.us/uploads/1/3/0/2/130289611/mupufebi.pdf
    • http://kobe11shoes.dadgifts.us/uploads/1/3/0/3/130379428/joduwiw.pdf
    • http://mx.talithawashington.com/uploads/1/3/0/6/130639098/fobugodedepur.pdf
    • http://management911.com/uploads/1/3/0/4/130478210/a96450e52544fc.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_off000078b7.bin
143ba45bfd043320db6478c9dde95f005465b57602c7270fc26b54f3846332be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B7 9752 bytes

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