Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f034b1bc1a71f63…

MALICIOUS

PDF

37.7 KB Authoring application: PDFedit
MD5: 7c665fc4ad7772a3130d8b26fb1083ad SHA-1: 696e42e76024d3d940b445b34e38cd7dc8adb1cb SHA-256: 0f034b1bc1a71f637857adbeef5b2746dac10e6d1e226d68d2b619e4b57e3c81
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute further malicious content. ClamAV detection and ML classification strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, aligning with phishing or malicious redirection tactics.

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://zihaoliufinpro.com/uploads/1/3/0/6/130639747/nuxuteligu_genisup_vikalurisugazi.pdf
    • http://tcland.weebly.com/uploads/1/3/0/5/130551836/4242021.pdf
    • http://nikkiheyder.com/uploads/1/3/0/7/130739483/fikira.pdf
    • http://ronstruckshop.com/uploads/1/3/0/4/130435638/2885725.pdf
    • http://horncomb.com/uploads/1/3/0/7/130739747/1743984.pdf
    • http://pigga.com/uploads/1/3/0/6/130603943/df526300aec5.pdf
    • http://mynaturalhairspa.com/uploads/1/3/0/3/130379163/130379163.html#shoulder+impingement+test+name

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010de.bin
920c0c4fcc9ffa2c4019c149db8b6b4efedf8fc15d05b99b88d27c9915a9a0b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE 8332 bytes

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