Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a848d9f0ccb92ab…

MALICIOUS

PDF

77.8 KB Authoring application: pdf-parser
MD5: b758f54d3cbdf4c7f6a3e3652c7dd61d SHA-1: 2673b705c2b070b57ae381c8aa9fd79a7bad4228 SHA-256: 0a848d9f0ccb92abd59aaf7a140544f5133ad1d0c894f6b5e8717f5be961aa9f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. These links likely serve as a lure to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://cleverchange.org/uploads/1/3/0/7/130776642/rilizizuzo_mexalu_pifunuperek_zarizotagam.pdf
    • http://myieltscertificate.com/uploads/2020/01/28/9845650.pdf
    • http://tomorrow-tree.com/uploads/1/3/0/7/130776113/gigazajutakesax_vuzevuxofupo.pdf
    • http://responsdirect.no/uploads/1/3/0/6/130620367/4381561.pdf
    • http://3rdeyefitness.com/uploads/1/3/0/5/130543052/1671143.pdf
    • http://nupelicanparty.org/uploads/1/3/0/4/130483761/130483761.html#carbon+footprint+science+def
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011fe.bin
0fe9431e4de6c618163618a3042adb1535b6191b5c3da1d5275c44e1c7f623a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE 9608 bytes
font_01_sfnt_off0000ec7f.bin
87d58be8557719f5804ce0a955641edc68d9722040cf8059220e94c12fe8c673		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7F 16144 bytes

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