Malicious PDF — malware analysis report

Static analysis result for SHA-256 25303f4281fb62b6…

MALICIOUS

PDF

35.2 KB Created: 2020-04-18 13:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 01fed91f4eca5cd5f28f1614deb31e6b SHA-1: fe2f486474cee63de8058ae9d63e452d49c29f09 SHA-256: 25303f4281fb62b66333a9a95a9e116a0f99d9c6f52036945b9282decf107eb5
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1598 External Remote Services

The PDF file contains a large number of external links, many of which point to other PDF files on different domains. This behavior is indicative of a link farm or SEO manipulation tactic, often used to distribute malicious content or improve search engine rankings for malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://the-whole-thing.com/uploads/1/3/0/5/130590105/130590105.html#alapana+telugu+movie+songs+free
    • http://oaklandhillpark.com/uploads/1/3/1/6/131636969/1830389.pdf
    • http://hydrologyskincare.net/uploads/1/3/0/7/130740498/sebapimepef.pdf
    • http://splinteredmindapparel.com/uploads/1/3/0/8/130873923/zigelanumugisa-kumufi.pdf
    • http://obsidianorganics.com/uploads/1/3/0/4/130483772/3916997.pdf
    • http://deckscoloradosprings.net/uploads/1/3/0/3/130313836/fiwabijunixugabo.pdf
    • http://usdotauthority.com/uploads/1/3/0/7/130775200/8164858.pdf
    • http://henhaul.com/uploads/1/3/0/8/130813378/fosexarapuxofip.pdf
    • http://daumcollectors.com/uploads/1/3/1/0/131069738/bagabamam.pdf
    • http://malikarosetennis.com/uploads/1/3/0/7/130738644/7211176.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_off00006046.bin
00ed5658ccf1e55c9e2733e2447debdd37e38b726d3502e3e81143c07d6557e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6046 8668 bytes

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