Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ad0881f9fc692b…

MALICIOUS

PDF

30.8 KB Created: 2020-04-15 06:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: aaf93736393841afe641d27f64a6905d SHA-1: f9d51c35a8c4039b53321e25aba76bce21f2d91e SHA-256: f5ad0881f9fc692bbbf5035e745bac6bcbea7188b2eff4c1d8b9c0e172c74835
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO abuse. The ML classifier also flagged this PDF as malicious. The document body contains garbled text and references to 'Vector background designs cdr format', suggesting a lure to disguise the malicious intent. The primary goal appears to be directing users to a network of potentially malicious or spam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://ductcleaningdc.com/uploads/1/3/0/7/130740045/130740045.html#vector+background+designs+cdr+format
    • http://csecomitesocialeteconomique.org/uploads/1/3/0/7/130740385/pijejalerumaboloxu.pdf
    • http://fionajanewalsh.com/uploads/1/3/0/6/130603673/pavunakeluliguraz.pdf
    • http://target3c.org/uploads/1/3/0/3/130323172/3561396.pdf
    • http://katasana.shop/uploads/1/3/0/6/130620833/6769423.pdf
    • http://cgpservicesfinanciers.ca/uploads/1/3/0/5/130588806/3424505.pdf
    • http://sunsteadsolar.com/uploads/1/3/0/5/130588237/e024d37c192220c.pdf
    • http://gabbyscreationsbytinamccoy.com/uploads/1/3/0/7/130739324/dee9fed7cf.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_off00005174.bin
0a6b748b076303900cae61f991769c00bff76c4ddea0606de399653c3ce8b9eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5174 7700 bytes

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