Malicious PDF — malware analysis report

Static analysis result for SHA-256 99eaa45659f06402…

MALICIOUS

PDF

36.7 KB Created: 2020-04-03 15:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b04cd80c12fcced162c85464f07bc1bd SHA-1: ce29b2bfd0b14a2dfff76c5fdb9f84d80c971039 SHA-256: 99eaa45659f06402a43ffe36f8299890b1c647862104758def3101b1619936bc
92 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. No scripts were extracted from this sample.

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://elisaforlini.com/uploads/1/3/1/4/131437005/131437005.html#masa+atomica+del+oro+yahoo
    • http://chancifulcreations.com/uploads/1/3/0/6/130640198/gudaseger-zubekigawunibeb-putigo.pdf
    • http://egitimcilerdenbatikhikayeler.com/uploads/1/3/0/5/130550772/46870dde09.pdf
    • http://springgullyanimalhospital.com/uploads/1/3/0/7/130776647/pasexiramej_fotiwafu_jurumib.pdf
    • http://gostvuteam.com/uploads/1/3/0/3/130313157/bedizidetelifi_benijopaf_zalivuni_musowubaxu.pdf
    • http://dontfeedstigma.com/uploads/1/3/0/7/130739922/jizegaziv.pdf
    • http://brandverletzt.de/uploads/1/3/0/7/130738497/robazatukerigut_gusamozufapoj_nenuzuvuzoxib.pdf
    • http://jkclass.org/uploads/1/3/0/9/130969905/8064603.pdf
    • http://debragoetz.com/uploads/1/3/1/4/131438093/jakosevofuxadur.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_off00006305.bin
2fe671abd17857e641827f7e191a7dc731748b2af95376d5682a8eb0c17a1691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6305 9388 bytes

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