Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab96314c2ef5b027…

MALICIOUS

PDF

38.4 KB Created: 2020-04-06 13:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3d1e09f5e1503b73c04588c4b4afb97e SHA-1: 92c79d69852c34ca3ad0738020bafe3ed128ac8e SHA-256: ab96314c2ef5b0274ac3a222af3555c5c6722359c5149200b1b471910290bf99
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or distribute further malicious content. The document body itself contains garbled text but includes the URL http://schaarzoekthaar.com/uploads/1/3/0/6/130604446/130604446.html#ecuaciones+equilibrio+estatico, which is also listed as an external URI. No scripts were extracted, and the primary malicious activity appears to be the distribution of these numerous links.

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://schaarzoekthaar.com/uploads/1/3/0/6/130604446/130604446.html#ecuaciones+equilibrio+estatico
    • http://cherrycreekcheer.com/uploads/1/3/0/8/130874297/zonetim-kuxufusozedexe.pdf
    • http://designsbykindredspirits.com/uploads/1/3/0/2/130272432/9599507.pdf
    • http://browngreasefuel.com/uploads/1/3/0/5/130547207/levofuvinupobegu.pdf
    • http://bathsaltheadshop.com/uploads/1/3/0/7/130775104/356c80386e.pdf
    • http://juansosairrigation.net/uploads/1/3/1/3/131379061/2874150.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_off00006ab2.bin
d9501ef601d1973df765b8c9592ab22a27664fad0ac44c45e7cd831ee61c33fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB2 9136 bytes

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