Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa853c5cefe35a9…

MALICIOUS

PDF

41.0 KB Authoring application: Scribus First seen: 2020-09-24
MD5: 873870512a4612ebf1476465fcd31a9a SHA-1: 3a86a0193ef5e60e37d9b676db74165fa961b4c7 SHA-256: 9aa853c5cefe35a953c987b3c88319416b22456be41f0364a7cfff10a6b6fb81
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded external links, a technique commonly used for SEO poisoning or to redirect users to malicious websites. The ClamAV detection 'Pdf.Dropper.Agent-7706353-0' further supports its malicious nature. No scripts were extracted, but the primary attack vector appears to be the mass of external links pointing to PDF files hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-7706353-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7706353-0
  • 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.
  • 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://datumimpact.com/uploads/1/3/0/6/130640219/5713861.pdf In PDF document text
    • http://pxatl.com/uploads/1/3/0/4/130435820/wanajopoz.pdfIn PDF document text
    • http://hotelnauvoo.net/uploads/1/3/0/7/130739253/4577352.pdfIn PDF document text
    • http://firstmam.com/uploads/1/3/0/6/130605339/480112.pdfIn PDF document text
    • http://retrayno.com/uploads/1/3/0/4/130435555/3616738.pdfIn PDF document text
    • http://guxofet.eccex.fun/uploads/2020/01/28/kazonu.pdfIn PDF document text
    • http://btravels.co.za/uploads/1/3/0/2/130289733/fda69.pdfIn PDF document text
    • http://singdichgesund.weebly.com/uploads/1/3/0/2/130271099/lofudabalorikeguvupe.pdfIn PDF document text
    • http://believeitornotphotography.com/uploads/1/3/0/5/130551890/d8334cbcd20d7.pdfIn PDF document text
    • http://richbassviolin.com/uploads/1/3/0/5/130590550/xuxeludavu_jopojolera_tegixoluvu_fikikexisopa.pdfIn PDF document text
    • http://corazondemujer.net/uploads/1/3/0/3/130313284/9640382.pdfIn PDF document text
    • http://cmprofessionaleventsdbscg.com/uploads/1/3/0/5/130590235/5265902.pdfIn PDF document text
    • http://myentouragemusic.com/uploads/1/3/0/4/130483773/130483773.html#esters+properties+chemguideIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307 8088 bytes
SHA-256: b5138194828f88bee76ac501811e07b20c1ee6242deddf3c26d305378b02e8b9
font_01_sfnt_off00006516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6516 2664 bytes
SHA-256: cdb8bd7c48199a08ef82272f3cd43f3465e9b606f9556a961cf5a0560de3782a

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