Malicious PDF — malware analysis report

Static analysis result for SHA-256 28186f948599f55e…

MALICIOUS

PDF

40.6 KB Created: 2020-06-06 01:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02d0960c285862e032d47eb60b0870bf SHA-1: b93d15f24630b7e1068359cde3484eaa73e04c0e SHA-256: 28186f948599f55ed5f28b1e55683c48d657e7b5bbc16a033bd9753d6ea7e17a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The primary lure appears to be a link to 'tammybombsaway.com', which itself contains further links. This suggests a link farm or redirection strategy, common in SEO spam or phishing campaigns. The ML classifier strongly indicates maliciousness.

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://tammybombsaway.com/uploads/1/3/1/4/131482853/131482853.html#%25C3%25A9valuation+invasions+barbares+cm1
    • http://daalcare.com/uploads/1/3/0/6/130604671/7509361.pdf
    • http://clairebunker.com/uploads/1/3/0/4/130479123/74dddb2.pdf
    • http://jadeartdesign.net/uploads/1/3/0/5/130588649/famasirozugupob.pdf
    • http://painbrun.com/uploads/1/3/0/3/130323311/7270d3637e34.pdf
    • http://ellamatesic.com/uploads/1/3/1/3/131380521/dde05.pdf
    • http://tammybombsaway.com/uploads/1/3/1/4/131482853/terms.html
    • http://tammybombsaway.com/uploads/1/3/1/4/131482853/dmca.html
    • http://tammybombsaway.com/uploads/1/3/1/4/131482853/policy.html
    • https://fibisadalasu538385749.files.wordpress.com/2020/06/golorasepawavebaron.pdf
    • https://savoxug.files.wordpress.com/2020/06/99797944135.pdf
    • https://jesaseg.files.wordpress.com/2020/06/wekulapodog.pdf
    • https://xexufadotafu.files.wordpress.com/2020/06/gakebalekigiwepafaza.pdf
    • https://zopoluwo.files.wordpress.com/2020/06/84196837983.pdf
    • https://dozovew639968984.files.wordpress.com/2020/06/gufufalexabadokob.pdf
    • https://nawitedimev.files.wordpress.com/2020/06/mijipaf.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_off00006bda.bin
28133a2f82a6e47d3ce868741d4b0af2e15315b3a297bfc64babba1c92b0c2c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDA 13276 bytes

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