Malicious PDF — malware analysis report

Static analysis result for SHA-256 d041027e5fc6e382…

MALICIOUS

PDF

48.1 KB Authoring application: pstoedit
MD5: 3d7ba7ad43686b9449fb6c5b3a00c5a8 SHA-1: 7d3af9f3e6d768692e9bd0e3ef161718dc814299 SHA-256: d041027e5fc6e382f5676a4f3aa8e89a8a4d941b9a3f9e3178bb06b7d785d810
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection further supports its malicious nature. No scripts were extracted, limiting the analysis of direct execution behavior.

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://numberandcognition.com/uploads/1/3/0/3/130324164/3964604.pdf
    • http://msandtherapist.com/uploads/1/3/0/6/130605076/nunivurakibiseradi.pdf
    • http://nuwi.gamehighlights.fun/uploads/2020/01/28/6313104.pdf
    • http://jevemadud.canlisexhatti.online/uploads/2020/01/28/petimejetut.pdf
    • http://digitaildesigns.com/uploads/1/3/0/5/130588861/e957a72573.pdf
    • http://youtubevideoscreation.com/uploads/1/3/0/6/130620555/nomemabeginaxugigajo.pdf
    • http://107islandjam.com/uploads/1/3/0/6/130621197/9915847.pdf
    • http://thebookthateveryoneshouldhave.com/uploads/1/3/0/6/130622083/delipatubusunu.pdf
    • http://perfeccionatupiel.com/uploads/1/3/0/2/130272330/47b88657cecea.pdf
    • http://tibi.nttrus.com/uploads/2020/01/29/nexiruzebu_zobijuzobu.pdf
    • http://votened.net/uploads/1/3/0/6/130603855/remiputam-zejesajudibiwik-rifixez-fefumitite.pdf
    • http://wir.businessofbeauty.online/uploads/2020/01/28/6393177.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/3/130313167/130313167.html#disciplines+of+a+beautiful+woman

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001348.bin
89dc046d5b3db9a4587c575110b705f84223832f486eff0cdcf76384c54cccfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1348 8772 bytes
font_01_sfnt_off00006798.bin
2fe275df57299b5b4ad40a75443545e853866b2c41bd8987b7ba3c1c59710497		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6798 11668 bytes
font_02_sfnt_off00008103.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8103 2652 bytes

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