Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e98179ad55fe0f…

MALICIOUS

PDF

54.6 KB Created: 2020-04-16 11:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5228b80fbb43c8d0df355d3e06caf74b SHA-1: c32c40c93f3c2d0f97f3d3bf23f9b6ad7b0d243a SHA-256: 54e98179ad55fe0f677cb311043e5f357f270991b799d46a8e055c6ba319677e
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links to other PDF files hosted on various domains, indicating a link farm. The primary purpose appears to be SEO manipulation or distributing a large number of potentially malicious documents. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the direct user-facing content.

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://machoco.com/uploads/1/3/0/6/130605018/130605018.html#acute+gastroenteritis+guidelines+adults
    • http://professionalcleaningservice.net/uploads/1/3/0/4/130483479/kodoso.pdf
    • http://tiendan.studio/uploads/1/3/0/2/130291493/1790698.pdf
    • http://wsociety.org/uploads/1/3/0/3/130379635/muvume-sebipese.pdf
    • http://mgcontainerssa.org/uploads/1/3/1/1/131164121/narubizoximo.pdf
    • http://teachersforsocialjusticelv.com/uploads/1/3/0/2/130271095/zabetowamesa.pdf
    • http://cortkrekoullc.com/uploads/1/3/1/6/131637743/7871960.pdf
    • http://upcowasteservice.com/uploads/1/3/0/4/130476984/rexizabodojubuv_furipibatoleti_gapowex.pdf
    • http://rulesagainstradicals.com/uploads/1/3/0/2/130287934/nuresobesebisa-padugafidoneri.pdf
    • http://incrediblegreen-power.com/uploads/1/3/0/5/130546118/280915.pdf
    • http://stcroixss.com/uploads/1/3/0/2/130272978/2a388088.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_off0000a456.bin
d3ffe2b13605637ad4f2566c337be6fe95596e5f48088e59df0d66e0116757e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA456 8196 bytes
font_01_sfnt_off0000c3e9.bin
6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E9 2864 bytes

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