Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23a67885d99f50a…

MALICIOUS

PDF

42.6 KB Created: 2020-04-02 08:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0017fb12fe7fb78c00ad1ebbd965456d SHA-1: 8ffb7eb3696c15d1ced8451475cfccda63608691 SHA-256: e23a67885d99f50a85e1f6f6d465a8a017e77c736529e46501da701ce1c13494
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a link farm. The document body, though partially obfuscated, contains text related to nutritional information ('Lysine to arginine ratio quinoa') which is likely a lure to disguise the malicious intent. The primary heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a technique to generate traffic or distribute further malicious content. No scripts were extracted from this sample.

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://awiredfamily.net/uploads/1/3/0/4/130494743/130494743.html#lysine+to+arginine+ratio+quinoa
    • http://vetnav.org/uploads/1/3/1/3/131384166/xidisumudix.pdf
    • http://blueoceanconsulting.xyz/uploads/1/3/0/4/130483050/xeburi_xajiwar.pdf
    • http://crispandcrunch.com/uploads/1/3/0/7/130740127/xixitipaworavorot.pdf
    • http://ohinternet.net/uploads/1/3/0/5/130589133/05669.pdf
    • http://plantesetpelerinage.fr/uploads/1/3/0/9/130969191/ddd413f6b.pdf
    • http://wbdllc.net/uploads/1/3/0/3/130323322/d470c46e.pdf
    • http://socalengineer.info/uploads/1/3/0/2/130274315/tupoju_nakak_zinasuwifibo_gurokibotaga.pdf
    • http://true-healthandwellness.com/uploads/1/3/0/5/130588230/6966564.pdf
    • http://ume.bh/uploads/1/3/0/7/130776134/kuvajinejodoxeka.pdf
    • http://signature-at-yishun.net/uploads/1/3/0/6/130604770/4436048.pdf
    • http://infinitelegacyvideo.com/uploads/1/3/0/3/130379589/69e3100c.pdf
    • http://astroliferecordings.com/uploads/1/3/0/4/130483338/letuvolibubifut_bopijezefono.pdf
    • http://countitalljoy.net/uploads/1/3/1/1/131163535/4575967.pdf
    • http://spiritualitamilano.com/uploads/1/3/0/9/130969332/4384289.pdf
    • http://scent.life/uploads/1/3/0/5/130540788/zoluk-pisepofefevaxas.pdf
    • http://thechurchlawgroup.com/uploads/1/3/0/6/130639509/nufusozinubusi-zudinita-tarazunekoleger.pdf
    • http://weddingsflowersnv.com/uploads/1/3/0/6/130605015/mepuxuwobik_nijaromanagu_xuxelapevine.pdf
    • http://chameleonprojects.co.uk/uploads/1/3/1/4/131437435/titomit.pdf
    • http://tmc-houston.org/uploads/1/3/0/3/130323291/nanadiv-funeradorosu-bajazixives-wovijup.pdf
    • http://espionology.com/uploads/1/3/0/2/130287839/91bc234e5b8.pdf
    • http://pekkakallinen.com/uploads/1/3/0/8/130874167/zexebida.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_off00007fc3.bin
aba354cda8521aa0e2a56b7d4f81ba4cef7ab9db1a7322bb6a012c8e43a9fe0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC3 7520 bytes

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