Malicious PDF — malware analysis report

Static analysis result for SHA-256 3afca05e0fb78851…

MALICIOUS

PDF

41.2 KB Created: 2020-04-05 04:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c0064282117f9b1534e2e592cfe3b202 SHA-1: 13136f25b0d467a0915b1514873fea73331b16a5 SHA-256: 3afca05e0fb788511439efb9bfd35c3a7c4340312a93aa5959a19a5a0451978c
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links to various domains, indicating a link farm or SEO manipulation tactic. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, suggesting the document's primary purpose is to direct users to a network of potentially malicious or deceptive websites. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://extravirgincoffee.com/uploads/1/3/0/4/130483348/130483348.html#define+the+concepts+of+ethnocentrism+and+cultural+relativism
    • http://harvardbusinesscase.com/uploads/1/3/0/5/130539718/3092340.pdf
    • http://elevate4life.org/uploads/1/3/0/6/130620906/5071586.pdf
    • http://blackcatknittingcompany.com/uploads/1/3/0/4/130489997/66fbe.pdf
    • http://glamourgeekbeautydublin.com/uploads/1/3/0/5/130541662/puzax.pdf
    • http://jackiesjewelscreations.com/uploads/1/3/0/4/130483345/9462931.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_off000065bc.bin
ebf71741b6499cfd31199d5f63f1610f747c4d8e7c54e2f0e22c27d69d28c26a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BC 7264 bytes
font_01_sfnt_off00008232.bin
4793c7e7673b9abee0cce5d28094b435cea9ea46ebd8ac88f0fb3d6138cc86df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8232 16172 bytes

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