Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a1183432e9dc27…

MALICIOUS

PDF

32.8 KB Created: 2020-04-24 15:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a2be77f8bff1f3bc8c2ebf9746f29253 SHA-1: 6245718686721b9471e8d89424a3629f57076c3c SHA-256: b7a1183432e9dc27eba569de938110a5332331e8b1156d789d6b73898d7a81b6
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document body, though heavily obfuscated, contains references to 'cheap platform shoes uk' and a URL that aligns with this theme. The ML classifier strongly indicates maliciousness, and the overall structure suggests a campaign to drive traffic to potentially malicious or scam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://iavnt.com/uploads/1/3/1/3/131383553/131383553.html#cheap+platform+shoes+uk
    • http://lunadepiscis.com/uploads/1/3/0/8/130814909/6631204.pdf
    • http://atwatervillagepsych.com/uploads/1/3/0/2/130289601/04e08.pdf
    • http://loristegmann.com/uploads/1/3/0/7/130776850/lafusuxexu.pdf
    • http://roselegalphotography.com/uploads/1/3/0/7/130775507/jaguwekewixabezisu.pdf
    • http://jljohnsonproperties.com/uploads/1/3/1/3/131398279/ziravewuz.pdf
    • http://tippecanoerealty.com/uploads/1/3/0/2/130291696/fijufewisupuvuz-jepidizedufuz.pdf
    • http://mountainandwaterstudio.com/uploads/1/3/0/6/130639100/942c666.pdf
    • http://legesyglobal.com/uploads/1/3/0/8/130874518/6053386.pdf
    • http://osaapps.com/uploads/1/3/1/3/131383673/denalopenu.pdf
    • http://future-classics.nl/uploads/1/3/1/3/131398295/nalujabi-talepodivibotu-tefika.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_off00005bc1.bin
4687ea36c8e4b60a9964cbfc0364c38403ae242852a67745def2075d5ab3602a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC1 6976 bytes

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