Malicious PDF — malware analysis report

Static analysis result for SHA-256 25f58c833b97813c…

MALICIOUS

PDF

43.5 KB Authoring application: PDFedit
MD5: 355eb41d7078b2a50f3fc99f9c447e92 SHA-1: a10ec6ff9b0ee0bbc3e52dfef50c21803c59ca20 SHA-256: 25f58c833b97813cc111ded7df5a012b72db1576c45947e7a42045e054d2c3ea
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for SEO poisoning and distributing malware. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to PDF editor release notes, aiming to trick users into visiting the linked sites.

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://sweetmaplecafe.co/uploads/1/3/0/5/130588570/petox.pdf
    • http://misssantaclara.com/uploads/1/3/0/7/130739117/vutekafut_zufajirufi.pdf
    • http://xxx666xxx.site/uploads/1/3/0/6/130640042/67ed9f.pdf
    • http://bluesprucebeeco.com/uploads/1/3/0/3/130324192/d13ee7dc0a4.pdf
    • http://masturblog.com/uploads/1/3/0/8/130814193/zujak.pdf
    • http://creditcoaches.org/uploads/1/3/0/5/130551324/38ac7d6febb5cc4.pdf
    • http://premierlvpm.org/uploads/1/3/0/6/130639922/bd5c679.pdf
    • http://mobilegroomersarasota.com/uploads/1/3/0/4/130483811/d264fa981230877.pdf
    • http://kraimgroup.com/uploads/1/3/0/6/130604434/ea24510c33218.pdf
    • http://mytexaschamber.com/uploads/1/3/0/7/130775712/basopakudazitoxa.pdf
    • http://purelightyogaschool.com/uploads/1/3/0/6/130639298/lotamom_nemotasimofi_jirusep.pdf
    • http://adsl-63-204-18-11.benefitplans.org/uploads/1/3/0/6/130621422/130621422.html#abbyy+finereader+engine+12+release+notes

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005169.bin
af7a96875939e4a70833ad965f5d66aa7224c9541b5b973a0a6c8ed062a23e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5169 8812 bytes

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