Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9e95bac9bdf54c…

MALICIOUS

PDF

37.8 KB Created: 2020-05-25 03:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a035761fe93b1dbb681375e12e074302 SHA-1: f67d43a7106c6fa39d427f9d702025aae74a4648 SHA-256: dd9e95bac9bdf54c1de564dd10bd30eb6afe4d1fcad097a911ef95e757046ff1
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link T1598 External Remote Services

This PDF document exhibits characteristics of a link farm or SEO spam, as indicated by the 'PDF_SEO_LINK_FARM' heuristic firing. It contains a large number of external links, including the primary URL http://74-123-72-117.mgwnet.com/uploads/1/3/1/4/131454436/131454436.html#quiste+exocelomico+que+%25C3%25A9+autismo. The document body, though partially corrupted, also contains embedded URLs, suggesting an attempt to redirect users to malicious or spam content. The ML classifier strongly flagged this PDF as malicious.

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://74-123-72-117.mgwnet.com/uploads/1/3/1/4/131454436/131454436.html#quiste+exocelomico+que+%25C3%25A9+autismo
    • http://timoandtitch.com/uploads/1/3/0/5/130546645/telunadififuweguxu.pdf
    • http://mx.actionsforhealthcare.com/uploads/1/3/1/4/131407424/7cb1bdc9.pdf
    • http://mooipermanentemakeup.com/uploads/1/3/0/6/130604931/8371939.pdf
    • http://mainospyloni.com/uploads/1/3/1/4/131437832/7d3894b8ccc.pdf
    • http://thailand40.com/uploads/1/3/0/6/130620353/1180502.pdf
    • http://bubblesandbarscompany.com/uploads/1/3/0/5/130550968/4a3732ba1d29.pdf
    • http://ireadbooksallday.com/uploads/1/3/0/4/130491599/ronenabigudugebotaj.pdf
    • http://financialvaluers.com/uploads/1/3/0/6/130604056/gipixizas.pdf
    • http://unitenergy.org/uploads/1/3/0/7/130739150/321e6cca0.pdf
    • http://whoisnecessityschild.com/uploads/1/3/0/5/130539926/melimopupuvitaron.pdf
    • http://fenomenoyoga.net/uploads/1/3/0/2/130291433/4929433.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_off00006543.bin
f278cab1465a0cb2b1b5de29642176a1b263155926e513773675e9d55167f6f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6543 12376 bytes

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