Malicious PDF — malware analysis report

Static analysis result for SHA-256 b73106cb9f92b18e…

MALICIOUS

PDF

33.6 KB Created: 2020-04-05 04:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 03554c77d7c63067b7da845a72b18e26 SHA-1: 57012c9c84f86c5db495907485f2dcc2254cb07f SHA-256: b73106cb9f92b18e28a76d73bdf165704bc0cd4d42d59027a5a530e0429eb241
92 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, a technique often used to host malicious content or redirect users to phishing sites. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass external PDF link farm, suggesting a coordinated effort to distribute malicious files. The ML classifier also strongly flagged this PDF as malicious. 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://loginetwork.com/uploads/1/3/0/6/130621115/130621115.html#descargar+cuadros+comparativos+en+word
    • http://fedkits.com/uploads/1/3/0/3/130379164/kivobutadizibu.pdf
    • http://businessfromhomesolutions.com/uploads/1/3/0/5/130542692/xaxaz.pdf
    • http://chipperhairbeauty.com/uploads/1/3/0/4/130483552/4492404.pdf
    • http://procemeterymanagement.com/uploads/1/3/0/4/130483146/wewipini.pdf
    • http://rek.se/uploads/1/3/0/5/130590059/e25180e0.pdf
    • http://bangovercrew.com/uploads/1/3/0/5/130551619/c0b0985bb22f53.pdf
    • http://christines-konditorei.net/uploads/1/3/0/2/130289063/rekagirefeje_mulerozaragujot_xalem.pdf
    • http://myaltoadventures.com/uploads/1/3/1/3/131382274/a63844.pdf
    • http://bostoneducationcompact.org/uploads/1/3/0/6/130620168/vefibos.pdf
    • http://sorteoiphone11.com/uploads/1/3/0/6/130620407/sumix.pdf
    • http://elliebick.com/uploads/1/3/1/4/131437956/7a92f3c8.pdf
    • http://crawford4chatham.com/uploads/1/3/0/9/130969116/dde3fe47.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_off00005aad.bin
bc265ad738f84ae43dd3a4dda63a0c001a14502dcf3c616281c75d3a6272f30f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAD 8584 bytes

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