Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca573e76ea7f4298…

MALICIOUS

PDF

41.8 KB Created: 2020-03-31 19:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9e582bd996fc84bd3502a89835799c1b SHA-1: e94270cd45c9e40e10e8fc53a8867bc707e36ea1 SHA-256: ca573e76ea7f42983333b5978173e1f2f8dc54dfc5b00120a9a9c516c743cac6
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly used for SEO manipulation or to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, and the ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs point to various domains, suggesting a broad distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9148195-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9148195-0
  • 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://65internet.com/uploads/1/3/0/2/130289603/130289603.html#oxidation+state+of+each+element+in+ch4
    • http://mydaisyschain.com/uploads/1/3/0/6/130604310/bb8e49da883.pdf
    • http://bestonlinerecipes.net/uploads/1/3/0/4/130436125/sitalesewaganipu.pdf
    • http://campaignartwork.com/uploads/1/3/0/9/130969281/3817887.pdf
    • http://kowalskihomeservices.com/uploads/1/3/0/5/130589412/verovovepupemubulopa.pdf
    • http://lunartouchreiki.com/uploads/1/3/1/1/131164067/ef4d7.pdf
    • http://thenakediceberg.com/uploads/1/3/0/5/130588434/gopiretavikilejofovo.pdf
    • http://cropshopinthe6ix.com/uploads/1/3/0/6/130605168/a32237ecfb.pdf
    • http://4jeleven.com/uploads/1/3/0/8/130874641/gonum.pdf
    • http://jesalynmaeharper.com/uploads/1/3/0/6/130620679/585272.pdf
    • http://rvtrucker.com/uploads/1/3/0/7/130775984/410474.pdf
    • http://bpoconcierge.com/uploads/1/3/1/4/131455680/somiwudunapoze.pdf
    • http://isawyatt.com/uploads/1/3/0/4/130436180/9edab41e.pdf
    • http://elisebrianne.com/uploads/1/3/0/7/130739000/merisivepusagopepat.pdf
    • http://montanagps.com/uploads/1/3/1/4/131413718/8945665.pdf
    • http://myfairwinds.com/uploads/1/3/0/2/130291785/batoradamavazox.pdf
    • http://ethericbodyjewellery.com/uploads/1/3/1/4/131407012/be8822.pdf
    • http://salinasimmigration.com/uploads/1/3/0/3/130379311/2299911.pdf
    • http://confirmnotconform.com/uploads/1/3/0/7/130775949/8683249.pdf
    • http://joanmkane.com/uploads/1/3/0/9/130970005/2a8cd3d.pdf
    • http://bestonlinerecipes.net/up
    • 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_off000078c3.bin
1440fb0e8252820969ade065fbd430b352d52b1c731a01acbaeb599bb3203f07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C3 8572 bytes

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