Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd085ad641c0d76…

MALICIOUS

PDF

37.1 KB Created: 2020-05-22 16:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c30424eae5c2cdecea10dfeac12349e3 SHA-1: ec127c22852ade26057f588b29c48c920eb12de5 SHA-256: 3fd085ad641c0d7673090d0d4b399c3b097f62ca465db2c080a651391ead84aa
92 Risk Score

Malware Insights

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

The PDF document contains numerous external links to other PDF files hosted on various domains, indicating a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious. The primary purpose appears to be directing users to a network of SEO-optimized PDF lures, likely to generate traffic or serve as a distribution point for further malicious content.

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://aqnft.salon225.com/uploads/1/3/2/3/132303240/132303240.html#caracteristicas+de+una+tienda+de+aba
    • http://ihs5k.org/uploads/1/3/0/4/130483558/d597c.pdf
    • http://countercurrant.com/uploads/1/3/0/9/130969062/mizubuvun_tejazipoj_vixiku_gubegixugotakir.pdf
    • http://uniqueewe.org/uploads/1/3/0/7/130738852/gulew_fetemizabej_rabomazosotepe_faweja.pdf
    • http://aimbehavioralhealth.com/uploads/1/3/1/3/131383228/zinesab.pdf
    • http://feathandkee.com/uploads/1/3/0/5/130589202/e4288302.pdf
    • http://jayrosetravels.com/uploads/1/3/0/6/130620176/30daa17b7305657.pdf
    • http://sonomacountypickleball.com/uploads/1/3/0/9/130969011/fizires_jevutixosumez.pdf
    • http://marcestrugo.com/uploads/1/3/1/8/131857120/036a9a.pdf
    • http://thefireflyfestival.com/uploads/1/3/0/5/130551073/joxetosanadibibiz.pdf
    • http://myecwc.com/uploads/1/3/1/3/131381946/sodupemurim.pdf
    • http://cpanel.katascuba.com/uploads/1/3/0/7/130740391/xixemodarovuno.pdf
    • http://adwords-web-site.com/uploads/1/3/1/0/131071082/tojegoreniveg.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_off0000622b.bin
216153d9161d290bfc3d31c7afb7b4387044303befafeb95b3d757592b4307af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622B 11736 bytes

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