Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d53880e233269f…

MALICIOUS

PDF

35.2 KB Authoring application: SWFTools
MD5: 0da10eadeee3477335f956b0391994fa SHA-1: f949dc494aeabec16e437bfec0f814ce58fd4f7f SHA-256: 74d53880e233269f3ff478cf472fc15c28b9a613e32610dd526f02e1455db87f
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 PDF and HTML files on different domains. This suggests a tactic to manipulate search engine results or to distribute a payload. The ClamAV detection and ML classifier further support its malicious nature, classifying it as phishing-related. While no scripts were explicitly extracted, the nature of the embedded links implies an intent to redirect the user 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://mvbabysitting.com/uploads/1/3/0/4/130483519/a2c2c2fdb69b63b.pdf
    • http://adrienneleigh.com/uploads/1/3/0/5/130590322/6201626.pdf
    • http://wizteamwork.com/uploads/1/3/0/4/130436165/22905a56.pdf
    • http://rozkalnikina.weebly.com/uploads/1/3/0/6/130604154/tozewoje.pdf
    • http://psupostdoc.org/uploads/1/3/0/6/130621218/4178221.pdf
    • http://writersink85.com/uploads/1/3/0/8/130814631/tifisuxesev-vidunowoxezawif.pdf
    • http://myfantasyfootballworld.com/uploads/1/3/0/7/130739377/130739377.html#facs+gating+strategy

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001086.bin
8f1030bb96667eabd1cb440170545af41b133914f9c06970cb6da8644efedf08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1086 7808 bytes

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