Malicious PDF — malware analysis report

Static analysis result for SHA-256 558c5cf53f7418ad…

MALICIOUS

PDF

36.7 KB Created: 2020-06-07 16:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00460dbe374817ebe4d4bf9661630fe9 SHA-1: 874f0c1307f11f0cf8e68a51d0bff149af1d776d SHA-256: 558c5cf53f7418ad273a9779048b9feaf6cc5129b4eeb0e3cc501e1579b98820
92 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains obfuscated text and the URLs point to various domains, suggesting a link farm or SEO poisoning attack designed to redirect users to malicious content. The primary intent appears to be driving traffic to these external PDF files.

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://us.momotombochocolatefactory.com/uploads/1/3/0/4/130476605/130476605.html#dict%25C3%25A9e+cm2+imparfait
    • http://stuffedcart.com/uploads/1/3/0/8/130874372/98938d4.pdf
    • http://mx.oregoneqc.com/uploads/1/3/1/6/131607117/pinux.pdf
    • http://kangameplay.com/uploads/1/3/0/7/130739695/b3ce3.pdf
    • http://topazcapitalgroup.net/uploads/1/3/0/4/130435712/4a1a32.pdf
    • http://mvfausses.com/uploads/1/3/1/1/131164187/838724.pdf
    • http://mx.artful-muse.com/uploads/1/3/0/4/130435857/4167008.pdf
    • https://zatugizatit.files.wordpress.com/2020/06/musefoju.pdf
    • https://wivobajet.files.wordpress.com/2020/06/tomekanatazipodabewotuva.pdf
    • https://fesofovajov.files.wordpress.com/2020/06/70649897872.pdf
    • https://pixapivuba.files.wordpress.com/2020/06/vegupamanonizafilof.pdf
    • https://gujuketav.files.wordpress.com/2020/06/fojifavugonalaguw.pdf
    • https://bikomipej.files.wordpress.com/2020/06/gajuxarim.pdf
    • https://vosafeviba.files.wordpress.com/2020/06/pidewid.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_off000062b6.bin
05334b33d71ad7843cfb29c20074defc4163a1725f9056fb68790522aa945159		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B6 10844 bytes

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