Malicious PDF — malware analysis report

Static analysis result for SHA-256 daba21bfa7e2d609…

MALICIOUS

PDF

36.1 KB Created: 2020-03-11 01:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a2819e860724f5845d3ee4a213133531 SHA-1: 4f735d0753898e2b2eec282fcb4b823a582b620c SHA-256: daba21bfa7e2d6098fa0ce592542f34cb5991a4072fcd32c28e89825ec99bf5a
92 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though partially corrupted, suggests a 'room rent contract sample' lure. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm, suggesting the primary goal is to drive traffic to potentially compromised or malicious web pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://twistedsugarut.com/uploads/1/3/1/0/131070089/131070089.html#room+rent+contract+sample
    • http://schmittwoodworkingllc.com/uploads/1/3/0/5/130590578/gadol.pdf
    • http://atrfootwear.com/uploads/1/3/0/5/130541765/69b62.pdf
    • http://www.teachforjeju.com/uploads/1/3/0/4/130436089/946495.pdf
    • http://naturesedge-fl.org/uploads/1/3/0/3/130313192/patazeralo_temabubigoze.pdf
    • http://fashionthinkers.com/uploads/1/3/0/4/130435906/4220848.pdf
    • http://bwprodutoshospitalares.net/uploads/1/3/0/7/130739836/4236059.pdf
    • http://thecoppertreeco.com/uploads/1/3/0/6/130620998/fizizurozu.pdf
    • http://mail.dare2beglammed.com/uploads/1/3/0/7/130740148/linevibon.pdf
    • http://commerce-runningabusinessunit.com/uploads/1/3/0/3/130313044/1354851.pdf
    • http://tryharvest.com/uploads/1/3/0/5/130590420/f4daaddcf217667.pdf
    • http://readyden.com/uploads/1/3/0/6/130639368/falibugokaz.pdf
    • http://royaltybond.com/uploads/1/3/0/4/130476135/9165940.pdf
    • http://ilove-bbb.com/uploads/1/3/0/4/130483487/tegugato.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_off0000672e.bin
01cae1064750be51f4ce0c065d176a9540e6f3b942930ad874b58bc12e8116b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672E 7172 bytes

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