Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e883cfaa481a33…

MALICIOUS

PDF

46.9 KB Created: 2020-06-18 12:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5464c89097c76ac689b20c4ca5804062 SHA-1: ea1532c583234bd1d8f62462dfa31804aa466371 SHA-256: f8e883cfaa481a33128d0c5eed2284664879c20f16802cfc90499decaa7257be
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 to other PDF files hosted on various domains. This pattern is indicative of SEO spam or a link farm designed to distribute malicious content or drive traffic. The document body contains obfuscated text and references to 'the nurbs book pdf', which appears to 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://lcjoiner.com/uploads/1/3/1/4/131406798/131406798.html#the+nurbs+book+pdf
    • http://fullerealty.com/uploads/1/3/1/4/131437087/raranelofulone.pdf
    • http://southernbasin.net/uploads/1/3/0/6/130639382/1b487b700ca911.pdf
    • http://mhsclassof1976.com/uploads/1/3/0/3/130379051/fogagowaluzalifi.pdf
    • http://ngantukz.net/uploads/1/3/0/5/130541765/muvexixufewusabu.pdf
    • http://nobriefing.com/uploads/1/3/0/6/130605376/jezuxu_jegusipuropil_jesutunijebulik_wezop.pdf
    • http://hostmaster.kidwellybowls.com/uploads/1/3/0/6/130604312/9234830.pdf
    • http://mlhconsultancy.com/uploads/1/3/0/5/130542717/925879.pdf
    • http://eeswfl.com/uploads/1/3/0/8/130874498/8896441.pdf
    • http://mhcsutherland.com/uploads/1/3/1/4/131407293/1395341.pdf
    • http://afuegofilms.com/uploads/1/3/0/7/130739836/sidemujiduwufedazunu.pdf
    • http://graydogtrading.com/uploads/1/3/0/9/130969981/fitojexakivexiv.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079aa.bin
7c6d19c8be9b3adfc32d17e46131b05df7d653ddd7e9df33a46f3ecc0b776916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AA 4792 bytes
font_01_sfnt_off000089c8.bin
a81bef87b3108f8a3778aca438732261dfd537afaae356c855b696c070eb0c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C8 11700 bytes

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