Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b812905b41d8d8…

MALICIOUS

PDF

55.1 KB Created: 2020-05-31 23:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6612e211931dee12db80d89678725277 SHA-1: 3802b2f74e482b3b7a9e4103b7b05b9937d2efc4 SHA-256: 48b812905b41d8d86850744e4f62a58eadd4a89ab61d0b884cdde720d21cfa51
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, many of which point to WordPress hosted PDFs, suggesting a link farm or SEO poisoning tactic. One prominent external URI, http://a1515416xstreamtravel.xsideas.com/uploads/1/3/0/6/130620923/130620923.html#jiro+dreams+of+sushi+free+online+download, is identified as malicious. The document body text, though heavily obfuscated, contains references to 'free online download' and the authoring application 'wkhtmltopdf', indicating a lure to a potentially harmful resource.

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://a1515416xstreamtravel.xsideas.com/uploads/1/3/0/6/130620923/130620923.html#jiro+dreams+of+sushi+free+online+download
    • https://xavodurumumo.files.wordpress.com/2020/05/juzufeki.pdf
    • https://keligorages.files.wordpress.com/2020/05/rakid.pdf
    • https://vudilofifo.files.wordpress.com/2020/05/85067892159.pdf
    • https://dizusepi.files.wordpress.com/2020/05/dasadarofomujuzu.pdf
    • https://wuwiwil.files.wordpress.com/2020/05/jaxek.pdf
    • https://wikanoxegi.files.wordpress.com/2020/05/dogewema.pdf
    • https://fojegosuke.files.wordpress.com/2020/05/xixuxuforugiligugo.pdf
    • https://samuwuv.files.wordpress.com/2020/05/xaneminadulipob.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_off00009a94.bin
edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A94 6440 bytes
font_01_sfnt_off0000aa85.bin
414f18e58232b4b80bfd377b2ccb550209d4aa77b2133e96856176b27479c504		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA85 11456 bytes

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