Malicious PDF — malware analysis report

Static analysis result for SHA-256 3698c59c18d86284…

MALICIOUS

PDF

37.6 KB Authoring application: PDFedit
MD5: 33dbe493a73a3752ecbb60811669f358 SHA-1: 6bce2fedbfe94afdfa4542f0388675148add040b SHA-256: 3698c59c18d862844becffb861791d4efc771d24cac82eba5fad903f0cc87195
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. 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 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious classification. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nuohotels.com/uploads/1/3/0/8/130874519/tufugabuwukopove.pdf
    • http://cuttingedgesebringfl.com/uploads/1/3/0/6/130621928/rimomotopejolosiliji.pdf
    • http://editor.bz/uploads/1/3/0/6/130639720/6872979.pdf
    • http://naftakw.com/uploads/1/3/0/6/130639437/jonadubutelab.pdf
    • http://shalongguojiclubsxianjinwang.br3h.com/uploads/1/3/0/2/130289235/e9dead13.pdf
    • http://thebasicist.com/uploads/1/3/0/5/130544386/furexifimub_xojawofi.pdf
    • http://teknfix.us/uploads/1/3/0/6/130603874/7011346.pdf
    • http://newlifesdaoh.org/uploads/1/3/0/7/130740323/welaxinij.pdf
    • http://matsohaholdings.net/uploads/1/3/0/4/130436095/417f7.pdf
    • http://daxi.chat/uploads/1/3/0/7/130775182/balebamopijofazolas.pdf
    • http://noosalittlecove.com/uploads/1/3/0/7/130740368/828cdb7.pdf
    • http://konapartyrentals.com/uploads/1/3/0/6/130639895/guxatamemoweradafid.pdf
    • http://sq6tb.slpny.com/uploads/1/3/0/7/130740393/130740393.html#acute+fascioliasis+in+sheep
    • http://matsohaholdin

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fcb.bin
1110447959503c75238c0f1bcdf9de7fad567fc767730a4530dcb0d3a64541bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCB 2696 bytes
font_01_sfnt_off00003bb9.bin
84dccbcada475c1caa2613cf6f43812492fe768648afdb1adbf1049621d0510f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BB9 7688 bytes

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