Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90dd1b2e126053d…

MALICIOUS

PDF

38.0 KB Created: 2020-06-11 15:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 452b7bf7b6f27cf6c971abb28e5e58a8 SHA-1: 14e0afad7a02fda72d79f440e1a10dc3a730e00b SHA-256: c90dd1b2e126053d26fe2a43611df05edd42b825c86b2113234ca5310e69600a
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The document body itself is heavily obfuscated and contains references to Java tutorials, which appears to be a lure. 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://critical-computing.com/uploads/1/3/0/6/130604720/130604720.html#upcasting+and+downcasting+in+java+tutorial
    • http://idmlondon.com/uploads/1/3/1/4/131437865/nikedumakij.pdf
    • http://mta-sts.mx.rebeccaprosper.com/uploads/1/3/0/6/130605344/taninisoreb.pdf
    • http://leasemyanmar.sproutsmyanmar.com/uploads/1/3/0/2/130271030/zitalaper.pdf
    • http://mail.texaswildwoods.com/uploads/1/3/0/5/130588639/zobolofoxile.pdf
    • http://ervanariasaomiguel.com/uploads/1/3/0/5/130551625/ruguzutagetos-xexapoxuse-mowujibitaxixa-boxepir.pdf
    • http://pest-police.com/uploads/1/3/0/7/130775440/kiwosijepete-goxikadufar-jagarodo.pdf
    • http://empresselle.com/uploads/1/3/0/3/130313215/fbd034e225.pdf
    • http://blog.nathandmaki.com/uploads/1/3/1/3/131398045/2178c0a477.pdf
    • http://falveypoolsspasinc.trustabiz.com/uploads/1/3/1/4/131413718/7201480.pdf
    • http://makingwhoopiepie.com/uploads/1/3/0/8/130873741/tijatik.pdf
    • http://realty4d.com/uploads/1/3/0/7/130738975/kutexigemudo.pdf
    • http://lamarato.com/uploads/1/3/0/6/130604896/gunurolarivow.pdf
    • http://74-123-76-192.mgwnet.com/uploads/1/3/0/7/130739454/c9c3d.pdf
    • https://forifibavir.files.wordpress.com/2020/06/14849372542.pdf
    • https://fifonupiza861279328.files.wordpress.com/2020/06/88929062763.pdf
    • https://lulerodibo.files.wordpress.com/2020/06/83850682208.pdf
    • https://lunigizuwuz.files.wordpress.com/2020/06/17032956724.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_off000065ac.bin
79670ea57ede1fedc3afbbed56a196258d1f40a4584f14903d06ba5f945d989f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AC 11128 bytes

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