Malicious PDF — malware analysis report

Static analysis result for SHA-256 59aeb0068ffd82be…

MALICIOUS

PDF

33.2 KB Created: 2020-04-11 11:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: aababce54c3fc4f76c021a03d7e83eaf SHA-1: 691628467e6b67d0506beb0accec0dcbd0f76229 SHA-256: 59aeb0068ffd82be8293d3d4c6cff85c05d9dd922283430dfa6ada1042be3df7
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. The document body, though partially garbled, contains a reference to a URL that is also listed among the extracted IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://allergy.mediutopia.com/uploads/1/3/1/4/131453355/131453355.html#i+will+never+not+ever+eat+a+tomato
    • http://notimeformean.org/uploads/1/3/0/4/130476541/5534706.pdf
    • http://superiortrusses.net/uploads/1/3/0/7/130775485/tenalof.pdf
    • http://oacmyanmar.com/uploads/1/3/0/6/130604044/6304c.pdf
    • http://eltrp.com/uploads/1/3/0/6/130603955/1381398.pdf
    • http://brushdartistry.com/uploads/1/3/0/6/130604580/8803544.pdf
    • http://amaes.online/uploads/1/3/0/5/130590008/2715854.pdf
    • http://caravanleisureni.com/uploads/1/3/0/5/130545365/2b4954.pdf
    • http://cleaningmadesimple.net/uploads/1/3/0/5/130545932/7819299.pdf
    • http://outinheels.com/uploads/1/3/0/6/130620747/5521772.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_off00005d0c.bin
640ce513440502b1499c87489919a12c10d17859d8df7cc0c8ee6b352fb1672b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0C 7208 bytes

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