Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c97d659d8d33e50…

MALICIOUS

PDF

39.8 KB Created: 2020-04-08 15:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b8a6bfd84c488f123f5706c644a60537 SHA-1: 07381f3f503d0a31aaeac9c4ebeda19c9acdcc4c SHA-256: 1c97d659d8d33e50dd3218081f2eeb4c34fc6ef7c81b7f0ea924b46c6d7dea1c
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, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains URLs that are also present in the list of extracted URLs. This suggests the primary function of this PDF is to act as a link farm, directing users to potentially malicious content hosted on various domains.

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://mynaturalhairspa.com/uploads/1/3/0/6/130604375/130604375.html#psicoterapia+breve+strategica+pdf
    • http://bluewaterislesboro.com/uploads/1/3/1/3/131379820/ruvirexegakugu.pdf
    • http://coastal-canines.com/uploads/1/3/1/3/131382790/8476335.pdf
    • http://puurriant.nl/uploads/1/3/0/6/130640123/tufog.pdf
    • http://tasteoforovalley.org/uploads/1/3/0/2/130270885/c6fdfeb02fc.pdf
    • http://eifriglaw.com/uploads/1/3/1/4/131452814/pokofi.pdf
    • http://teammonstersinthemaking.com/uploads/1/3/0/3/130379803/4465807.pdf
    • http://neilcutting.com/uploads/1/3/0/6/130604363/5ff850fa.pdf
    • http://bicycleclubdenver.com/uploads/1/3/0/6/130639856/c5fe4c41e41da.pdf
    • http://mywebcheetah.com/uploads/1/3/0/5/130540493/240f465ccef9.pdf
    • http://wesselsnet.com/uploads/1/3/0/5/130590564/2035782.pdf
    • http://bookblushed.com/uploads/1/3/0/3/130379368/5400749.pdf
    • http://motorclub365.us/uploads/1/3/0/5/130551416/domezitunuk.pdf
    • http://yohotravelling.com/uploads/1/3/0/8/130874591/kilidomut_sigibupoxuk_xakexabo_bukusu.pdf
    • http://nyanyanizhniynovgorod.ru/uploads/1/3/0/6/130605159/junugip-sosukelit.pdf
    • http://kweeba.com/uploads/1/3/1/3/131381471/suluzolumamakari.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_off00007022.bin
81446ae6ad9057303d4ffb2ceba9fcbdf49dd730a945d8d67c417b71eb091939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7022 9040 bytes

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