Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d37a2aa36f998d…

MALICIOUS

PDF

41.1 KB Created: 2020-05-17 05:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a301ff7bec9c3f0ed34db871c47de0ff SHA-1: b78f08838926fcf232139164479ce65df11befd8 SHA-256: a5d37a2aa36f998dca497e18894b442d1be746bf406934b0878d77fab879574e
92 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The presence of numerous links to unrelated domains suggests a link farm designed to drive traffic or host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pigeongaming.net/uploads/1/3/0/4/130483086/130483086.html#aha+acls+provider+manual+pdf+free
    • http://thecastlerockroofers.com/uploads/1/3/0/7/130776814/e7622c3.pdf
    • http://yourbackyardbbq.com/uploads/1/3/0/7/130738684/sanuridugometuw-fogug-lizowonifonipal-zinisan.pdf
    • http://starrtreatments.com/uploads/1/3/0/8/130874223/dezafasurig.pdf
    • http://tourfuture.net/uploads/1/3/0/9/130969876/wimewun.pdf
    • http://heartsgreen.com/uploads/1/3/0/8/130874278/poxiduwetefew.pdf
    • http://dcdsbworkforcecensus.com/uploads/1/3/0/8/130874222/8795db4da7522dd.pdf
    • http://facultyretreat.org/uploads/1/3/1/4/131438610/sumuvejezoto-tedosa.pdf
    • http://readingandspellingtutor.com/uploads/1/3/0/4/130478975/c4f198d.pdf
    • http://simplypure-thesimpletruth.com/uploads/1/3/1/6/131637248/venovedasip.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_off00005428.bin
cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5428 1936 bytes
font_01_sfnt_off00005d67.bin
6f4387f6c79fc21c08c5c31cb611b9e1935529c100a5a29457c487ad702a7f89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D67 10380 bytes
font_02_sfnt_off00008123.bin
cda3210b671fcb48cb8d5bf5ad71b65b7c3df9f1e73716f44646e05c83d01941		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8123 16336 bytes

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