Malicious PDF — malware analysis report

Static analysis result for SHA-256 9547b7f982e14cf0…

MALICIOUS

PDF

34.3 KB Authoring application: OpenOffice Draw
MD5: ad69e020029e7d8d5539cb2e9e337e09 SHA-1: 89d5c403fb6860c5f72a4c62247d67b88d0010a0 SHA-256: 9547b7f982e14cf03b94c1f695b6438c47b4e9b53d8066824fcf823921c940cd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing or traffic-generating PDF. The document body contains text related to 'OpenOffice Draw Manual de recursos humanos pdf', which appears to be a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://telelistamg.com/uploads/2020/01/28/6323266.pdf
    • http://ncrage.com/uploads/1/3/0/6/130639251/2479958.pdf
    • http://alissajacobscmt.com/uploads/1/3/0/2/130291475/8615205.pdf
    • http://seanaudleylaw.com/uploads/1/3/0/7/130739660/begul.pdf
    • http://markbarun.com/uploads/2020/01/28/lotonaduj-sosesogo-gukunave.pdf
    • https://newupekefat.weebly.com/uploads/1/3/0/3/130313459/derogazuz.pdf
    • http://realmotivated.com/uploads/1/3/0/6/130639842/dezafawazazabexatobi.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/2/130289801/130289801.html#manual+de+recursos+humanos+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000117f.bin
566d6c5ea2bab7f9150cc281644774ee5f0a33bc2c8375d04427eb64b2903a7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F 10356 bytes

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