Malicious PDF — malware analysis report

Static analysis result for SHA-256 652d329a98a31c8c…

MALICIOUS

PDF

76.1 KB Authoring application: PDF Studio
MD5: fba7f2ccf5eb39fc121a228ac11db65f SHA-1: f4c111763cd94d57b1be4184de510d013545bfe5 SHA-256: 652d329a98a31c8cf951c09ddace5ac1732ee0b73e77269fcffa741376e7585c
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The majority of these links point to PDF files hosted on various domains, suggesting a link farm or a method to distribute further malicious content. While no scripts were explicitly extracted, the ML_NYX_PDF_MALICIOUS and ClamAV detections confirm the malicious nature of the file, likely related to phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://millennialwellnesscenter.com/uploads/1/3/0/6/130620543/919f23abb.pdf
    • http://cpt-you-are-not-alone.com/uploads/1/3/0/6/130640060/49c4552e.pdf
    • http://talkupyouth.com/uploads/1/3/0/6/130639277/zikukefemerozipawet.pdf
    • http://boneandstone.net/uploads/1/3/0/6/130639397/6389856.pdf
    • http://meshayla.com/uploads/1/3/0/6/130639537/130639537.html#bangla+bangladeshi+ghazal
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010f5.bin
f34242f71608365346157012b9a2059e296551b53c7429b64da43079106085bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5 9124 bytes
font_01_sfnt_off0000495c.bin
3a4d7f3ba3b5bfea6f73a98d9c69fd2cfee5fbf4e13736a3a7fea77a7b12fa3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x495C 10716 bytes

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