Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94f06d9fed2b405…

MALICIOUS

PDF

34.6 KB Created: 2020-06-01 07:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0c17e1fd5c649cc81fb708179656423 SHA-1: 7608a61b550c0de61c2465680bb8a6e5cdc2d444 SHA-256: d94f06d9fed2b4059ed2597be0e0bda386eac707ffcdc74e0782b9ab76e957d4
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, many of which point to domains that appear to be part of a link farm. The document body mentions "The hateful eight awards", suggesting a lure to attract clicks. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. No scripts were extracted, but the primary attack pattern appears to be directing users to a network of potentially malicious or SEO-spam websites.

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://rubbercityshakes.com/uploads/1/3/0/8/130814286/130814286.html#the+hateful+eight+awards
    • http://oxidizedglasscom.com/uploads/1/3/1/3/131383854/lezibokudov.pdf
    • http://sweattafit.com/uploads/1/3/0/4/130436033/dinemunoxojejeg.pdf
    • http://calexambulance.com/uploads/1/3/0/6/130603744/jakebobumewav-kiralal-tirexajuros-vudisimikewo.pdf
    • http://74-123-76-181.mgwnet.com/uploads/1/3/1/3/131384414/7955308.pdf
    • http://vikingband.net/uploads/1/3/0/4/130483912/ranomuzumetezowoxa.pdf
    • http://ccinvesting.co/uploads/1/3/0/5/130543798/ab8fa224.pdf
    • https://zeraperusute.files.wordpress.com/2020/05/ribudusubejuforumudupexe.pdf
    • https://kikibok.files.wordpress.com/2020/05/fizipuxudedikebewafa.pdf
    • https://niwegivoval.files.wordpress.com/2020/05/nabexigugesidepi.pdf
    • https://vozomurazawi.files.wordpress.com/2020/05/45486738812.pdf
    • https://juruvedofe.files.wordpress.com/2020/05/medijeniwufigi.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_off00005d61.bin
c5bf0a74bdfe670d5519195dbf2149b1a49648629d7d490820da21b20d96a0ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D61 10080 bytes

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