Malicious PDF — malware analysis report

Static analysis result for SHA-256 51dfdfe6fb99d96c…

MALICIOUS

PDF

75.4 KB Authoring application: LibreOffice Draw
MD5: 2efc5cac9e3f3ef8851a6b0149366679 SHA-1: 30e4333809a068f157868fe55d9d93117492c532 SHA-256: 51dfdfe6fb99d96c9d20dc4a73c009040220d9dcb219d053691d3b9918b573d8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files hosted on various domains. This behavior is indicative of a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as phishing-related.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://signagedude.com/uploads/1/3/0/5/130539908/gudiwuxelom-rubilefid-pobefujugafa.pdf
    • http://annabelle-t-taylor.com/uploads/1/3/0/4/130483765/fonunarijorudononom.pdf
    • http://beautyenpointe.com/uploads/1/3/0/5/130544672/xobeninogodu_niropepe_tafepat_pesarogozunamaj.pdf
    • http://mywashcard.ca/uploads/1/3/0/4/130476075/vesefodojowebup.pdf
    • http://podollangpis.devsite-1.com/uploads/1/3/0/6/130639656/130639656.html#ableton+live+packs+trumpet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001143.bin
8d829f7f1e444b6a1771cc13cb05006fe49a1bd95ed815bad32db57f6687fddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1143 8844 bytes

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