Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad6e55b7128747a…

MALICIOUS

PDF

39.0 KB Authoring application: LibreOffice Draw
MD5: f24990a74a3f19fb8674dce0847b27f1 SHA-1: 00f1f4172c2ab273d6d05c932bc8002767bde5d2 SHA-256: aad6e55b7128747abb02a9028cb429057be2649fab8b5fdaa74798cb7ba2f941
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links. The heuristic PDF_SEO_LINK_FARM specifically indicates a link farm designed to redirect users. The document body, though partially corrupted, also contains several of these URLs, reinforcing the phishing or malware distribution intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://wasini.mammoth24.com/uploads/2020/01/27/6215408.pdf
    • http://fidojido.bestperles04.fun/uploads/2020/01/28/f234bd244.pdf
    • http://ketet.graf-von-eichendorff.online/uploads/2020/01/28/sojudisuti_sevesamefetu_gudutirubezew_javin.pdf
    • http://suzannesamin.com/uploads/1/3/0/2/130271049/padawilitediwuji.pdf
    • http://atticustiling.com/uploads/1/3/0/6/130639524/281231.pdf
    • http://cass-travis-art.com/uploads/1/3/0/3/130379447/rikozivoza.pdf
    • http://carolinaboardandbowl.com/uploads/1/3/0/4/130436224/5a5111bfac916a.pdf
    • http://zinererija.alexupwork.com/uploads/2020/01/28/sikizu.pdf
    • http://laurenpawelski.com/uploads/1/3/0/6/130604225/59e425e2ef6.pdf
    • http://michaudwellness.com/uploads/1/3/0/4/130489649/130489649.html#color+uniforme+carabineros+de+chile

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012e8.bin
1873aeb40eae9b78db32d5291191356f35d85aca27a705a928bc8ad6363e4a04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8 9716 bytes

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