Malicious PDF — malware analysis report

Static analysis result for SHA-256 2050e2698c75b93b…

MALICIOUS

PDF

39.3 KB Authoring application: SWFTools
MD5: 06bae4acbe5ac9c7aabf220bf193dd87 SHA-1: 045f3da74163ee164b252786887c98c6508f3b06 SHA-256: 2050e2698c75b93b4ac8b693aee3f256325d48f2291d1c9c4c758d12ab8b92e6
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files, a technique commonly used for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary IOCs, directing users to potentially malicious content.

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://mof.chemicalstorage.ru/uploads/2020/01/28/xaluko.pdf
    • http://miamfoundation.org/uploads/1/3/0/5/130552043/xulesaridela-naxakud.pdf
    • http://refutingthedoubts.com/uploads/1/3/0/6/130621006/f54f5.pdf
    • http://gegi.iivii.icu/uploads/2020/01/28/4920881.pdf
    • http://sdaerospace.com/uploads/1/3/0/6/130604125/75349.pdf
    • http://devour-sk.com/uploads/1/3/0/4/130494871/4763889.pdf
    • http://siphc.net/uploads/1/3/0/4/130488429/4da6c459a8a9c36.pdf
    • http://nomoremondays.us/uploads/1/3/0/6/130622058/zusegewuvowu.pdf
    • http://rebeccalaplacaattia.com/uploads/1/3/0/6/130605376/130605376.html#sample+abstract+for+thesis+in+information+technology

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001194.bin
d2963ac9ab4f0c66b25b7c24609ac9ddeb902decabc3a73b166c6cb9529d299c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1194 8264 bytes

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