Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5ca8e88b8a3541…

MALICIOUS

PDF

30.2 KB Authoring application: PDFBox
MD5: fc7834ef0c369369a957afbdeefe209c SHA-1: bda9ce9bf1d59ebedfc6284a0d348c6f896c6e4f SHA-256: 2e5ca8e88b8a3541f1bd8a225dcf5a682ff841e6d0e5e3b5ff1ffbcbbd0edf9a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flag this file as malicious. The embedded URLs suggest a phishing or SEO spam campaign, aiming to redirect users to potentially malicious content hosted on numerous domains. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://myskiped.com/uploads/1/3/0/5/130540082/2b44bc.pdf
    • http://ri4d.com/uploads/1/3/0/6/130604566/nezid_korux_jenumuvegabu_petakugewalil.pdf
    • http://monolid.net/uploads/1/3/0/7/130740082/bfd77105e74.pdf
    • http://pediatricwellness2019.com/uploads/1/3/0/5/130589100/linofiziwo.pdf
    • http://newplumtreeheights.com/uploads/1/3/0/5/130539238/9cc6e0f.pdf
    • https://buxazudekokex.weebly.com/uploads/1/3/0/2/130289731/ridijenufobolub.pdf
    • http://nancyellenmiller.com/uploads/1/3/0/6/130639575/xesafovefupike-xerabirononomap.pdf
    • http://mxwdjty.com/uploads/1/3/0/4/130483096/wiwewaponexaja.pdf
    • http://a1412531xstreamtravel.xsideas.com/uploads/1/3/0/6/130620366/130620366.html#bearing+load+calculation+example+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000117d.bin
5bdeab3f2615b7f3f6786edecae0e4733d26ddb0d12b3209780ac7e701053df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117D 7540 bytes

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