Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52104508a004f6e…

MALICIOUS

PDF

46.2 KB Created: 2020-04-13 04:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5bbcaeb788b12f31d9b4d0a609c6978f SHA-1: 5ce0464269a5b2881eda2e924d812250ba4026ba SHA-256: c52104508a004f6ee5c39d79b330b5c9a8a06b9b70df21b5f2419544f2efd0c9
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting an SEO link farm tactic. The primary heuristic firing indicates a PDF SEO link farm, with multiple URLs pointing to various domains. The document body, though partially garbled, contains references to these URLs and the term 'wikipedia', potentially to appear legitimate. 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://familyadultdaycare.com/uploads/1/3/1/3/131383319/131383319.html#que+es+un+montaje+esc%C3%A9nico+wikipedia
    • http://jennhouzz.com/uploads/1/3/0/5/130590140/kolimajetopofozuta.pdf
    • http://ricardoaktuell.net/uploads/1/3/0/6/130620176/b150747.pdf
    • http://detroitheart.com/uploads/1/3/0/8/130814225/7239415.pdf
    • http://bentanimalshelter.com/uploads/1/3/0/5/130543511/vegevusemaliliditut.pdf
    • http://thelinehan-dbt-internationalsociety.org/uploads/1/3/0/3/130379142/e2190d.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_off00006d21.bin
17297542d651f7c35e57af82ebd73db71d398fbdbd248a5e126f21302565b489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D21 8500 bytes
font_01_sfnt_off00008c27.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C27 2652 bytes
font_02_sfnt_off0000958e.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x958E 16036 bytes

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