Malicious PDF — malware analysis report

Static analysis result for SHA-256 51fa1438dbe93e00…

MALICIOUS

PDF

45.3 KB Authoring application: LibreOffice Draw
MD5: d2a66a506c32ec4eb005d0c55c00e48e SHA-1: 2d2b3a9ae2ef6e682b02b03f8da9934960dbba99 SHA-256: 51fa1438dbe93e001a58ae81be5ff910a5fc6d2140376be293b240f33cea3517
150 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, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent. The embedded URLs point to various PDF files hosted on different domains, suggesting a link farm designed to redirect users to potentially malicious content. No scripts were extracted from this sample.

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 https://damagemawi.weebly.com/uploads/1/3/0/3/130379114/b48978dd0a9.pdf
    • http://mobilhomebluesky.com/uploads/1/3/0/4/130435898/4731841.pdf
    • http://trustedfinancialpro.com/uploads/1/3/0/4/130483202/9040317.pdf
    • http://christinahankinsart.com/uploads/1/3/0/7/130740252/kepiwaxun_nowulojowa_vujazeti.pdf
    • http://club8inch.com/uploads/1/3/0/5/130589433/1922604.pdf
    • http://prairienanotech.net/uploads/1/3/0/4/130488615/mizagugopiboj_wonefuvufuxorav.pdf
    • http://nuthoppers.com/uploads/1/3/0/4/130436250/9314083.pdf
    • http://mikesfamoussteaksandsubs.com/uploads/1/3/0/2/130287239/130287239.html#list+of+extinct+and+endangered+animals+in+the+world

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001192.bin
4e1403a84ce79b4816c30c306e05356b04043a4309236bce6f48191dbb3a2abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1192 8340 bytes

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