Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa853c5cefe35a9…

MALICIOUS

PDF

41.0 KB Authoring application: Scribus
MD5: 873870512a4612ebf1476465fcd31a9a SHA-1: 3a86a0193ef5e60e37d9b676db74165fa961b4c7 SHA-256: 9aa853c5cefe35a953c987b3c88319416b22456be41f0364a7cfff10a6b6fb81
120 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.

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.
  • ClamAV: Pdf.Dropper.Agent-7706353-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7706353-0
  • 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
    • http://pxatl.com/uploads/1/3/0/4/130435820/wanajopoz.pdf
    • http://hotelnauvoo.net/uploads/1/3/0/7/130739253/4577352.pdf
    • http://firstmam.com/uploads/1/3/0/6/130605339/480112.pdf
    • http://retrayno.com/uploads/1/3/0/4/130435555/3616738.pdf
    • http://guxofet.eccex.fun/uploads/2020/01/28/kazonu.pdf
    • http://btravels.co.za/uploads/1/3/0/2/130289733/fda69.pdf
    • http://singdichgesund.weebly.com/uploads/1/3/0/2/130271099/lofudabalorikeguvupe.pdf
    • http://believeitornotphotography.com/uploads/1/3/0/5/130551890/d8334cbcd20d7.pdf
    • http://richbassviolin.com/uploads/1/3/0/5/130590550/xuxeludavu_jopojolera_tegixoluvu_fikikexisopa.pdf
    • http://corazondemujer.net/uploads/1/3/0/3/130313284/9640382.pdf
    • http://cmprofessionaleventsdbscg.com/uploads/1/3/0/5/130590235/5265902.pdf
    • http://myentouragemusic.com/uploads/1/3/0/4/130483773/130483773.html#esters+properties+chemguide

Extracted artifacts 2

Files carved from inside the sample during analysis.

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

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