Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5abc872d4c9929…

MALICIOUS

PDF

42.3 KB Created: 2020-04-05 16:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b7d10d56601a0471584cdee786c8f4c6 SHA-1: 29b6c4b8394d540ff854333c225f7f909e6f7cfb SHA-256: 9e5abc872d4c9929e29eaa3fb9fc989d74cd81d79e1bea38843826dda888916d
92 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, many of which are structured as SEO-optimized URLs pointing to PDF files or HTML pages. The document body itself contains a lure related to a movie title, suggesting a social engineering tactic to encourage users to click on these links. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://stevensonsconglomerategroup.com/uploads/1/3/0/8/130813616/130813616.html#ciudades+de+papel+2+pelicula+completa+en+espa%C3%B1ol
    • http://hbcommunitymortgage.com/uploads/1/3/0/5/130539419/104691.pdf
    • http://terroirsf.com/uploads/1/3/0/4/130489371/xisofusa.pdf
    • http://firstclassauto.us/uploads/1/3/0/6/130639896/726223.pdf
    • http://www.gilles.gent/uploads/1/3/0/7/130776855/jomuzutejazerit.pdf
    • http://crownsyrkesklader.com/uploads/1/3/0/6/130604896/dofer.pdf
    • http://homebakedbusiness.com/uploads/1/3/0/6/130604254/655743.pdf
    • http://lanceslaton.com/uploads/1/3/1/1/131164355/4774291.pdf
    • http://rejoad.com/uploads/1/3/0/4/130483047/nagenuxagovu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057ae.bin
2611aba438e1ed44b3308727675beed49a9cfe2d3b181e0e3d79c5657c1adede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57AE 8332 bytes
font_01_sfnt_off00007657.bin
6a62284a74f926445ab72f6c532a69f04f1d9c99badda850468770142631ccaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7657 3212 bytes
font_02_sfnt_off00008325.bin
17eb10cd047a535b63198d48ca15e2dbaf3ed96a328d1f59eea481c3b6d9bd8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8325 16396 bytes

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