Malicious PDF — malware analysis report

Static analysis result for SHA-256 355380d75b397431…

MALICIOUS

PDF

35.0 KB Authoring application: PDFBox
MD5: 619dd07a2274a164236d0c9a8cec4660 SHA-1: 2605eb7c52fa396004dd650912361b3cdd5ae169 SHA-256: 355380d75b39743196ed6dae39e6a7efd7cb829b19b78ff0d13c5b4949bc5228
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection also flags this as a phishing-related threat. The document body, though heavily obfuscated, contains references to the URLs, suggesting a coordinated effort to distribute malicious content through a link farm. The primary attack pattern involves directing users to these external resources, which likely host further malicious content or phishing pages.

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://obedientsoftware.com/uploads/1/3/0/6/130621325/ee5fc0c2ce8d4b4.pdf
    • http://msg-ec.com/uploads/1/3/0/2/130289503/tomubul.pdf
    • http://priorlakeselfstorage.com/uploads/1/3/0/2/130272352/7903e2cc75.pdf
    • http://lovereimagined.com/uploads/1/3/0/6/130639318/rubidimunujat-jisewu-mukiwexajuku-tutad.pdf
    • http://nuwod.dekocasa.com/uploads/2020/01/28/kumozagudoxagu.pdf
    • http://rockcrossingcc.com/uploads/1/3/0/6/130621634/b67d40376a0.pdf
    • http://mygosolartoday.com/uploads/1/3/0/5/130550879/dapevete.pdf
    • http://741251268854080539.weebly.com/uploads/1/3/0/6/130621895/f4b234.pdf
    • http://mackenzieemievents.com/uploads/1/3/0/3/130379770/130379770.html#electrolysis+of+water+experiment+with+pencils+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ad.bin
b95b4ace98bc2379ead631829c59fa8bcdd9c0d4f7609f0f7abf68238ea28925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD 7448 bytes

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