Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d16141ad7c98c6…

MALICIOUS

PDF

34.3 KB Created: 2020-04-05 15:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5be8a1cf6111c17674f9db8e6ad12775 SHA-1: 86705272fbeaf83675667b3fe6b88ccccd0f6d3f SHA-256: 91d16141ad7c98c69bdd39d2a3115e46109c32a11c1b0ad773ed1f1fc3b29e12
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing indicating a large number of external links, suggesting a link farm or redirection tactic. The embedded URLs point to various domains, many of which appear to be part of this link farm. The document body itself is largely obfuscated but contains a title related to English words starting with 'b', which may be a lure. No scripts were extracted from this sample.

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://catholicsonfire.net/uploads/1/3/0/9/130969559/130969559.html#palabras+en+ingles+que+empiecen+con+la+letra+b+y+su+significado
    • http://alaskaforbernie.com/uploads/1/3/0/4/130435835/wulefaneb.pdf
    • http://richardbrunst.com/uploads/1/3/0/6/130621776/kugaf.pdf
    • http://purseonalityny.org/uploads/1/3/0/8/130814534/xosibalaralu-soxekibib-lodedofef-sefegarikipu.pdf
    • http://virtualassistantstephanie.services/uploads/1/3/0/6/130604617/bisoxezazatoweze.pdf
    • http://calbees.org/uploads/1/3/0/4/130436190/dafugijevibag-zebijabe-davelamumimub.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_off000060d9.bin
225906ebaccc31cc8864152e1358f65cc6ba1af7068e4e60954a13a2940863a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D9 7432 bytes

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