Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73ede1f3eb6d55c…

MALICIOUS

PDF

31.3 KB Authoring application: ImageMagick
MD5: b0b4e57d89ff8f4a53d15dcc54c5f8d3 SHA-1: 23d3754f7ab632759ae4bbb633467291d6a6181a SHA-256: a73ede1f3eb6d55cf5c1ad19686c36301e84c75b47ff447ce9a73ff6219c7190
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure disguised as a volleyball score sheet, directing users to a malicious domain.

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://singersandactorsworkshop.com/uploads/1/3/0/8/130813373/rilarewewel.pdf
    • http://connectthelotscamden.com/uploads/1/3/0/4/130488833/winip.pdf
    • http://superyachtpanel.com/uploads/1/3/0/7/130739423/1655523.pdf
    • http://campdogdesign.com/uploads/1/3/0/6/130620757/f21314d9bcad7e1.pdf
    • http://talltowergames.com/uploads/1/3/0/5/130539659/1451150.pdf
    • http://prosphatos.com/uploads/1/3/0/5/130541743/suzavewajufenu-vinapino.pdf
    • http://carsonmugs.com/uploads/1/3/0/6/130603838/d53eedc8.pdf
    • http://sustainabilitylaboratories.org/uploads/1/3/0/4/130436306/pulisiz_wijiwib_kepered_junoluzip.pdf
    • http://official-resky.com/uploads/1/3/0/4/130490078/fbff994d4f.pdf
    • http://www.spivakhudsonvalleyrealestate.com/uploads/1/3/0/7/130739564/8344083.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/7/130776088/130776088.html#nfhs+volleyball+score+sheet+example

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000025ae.bin
9422715c5ad23e68914555fe3493ad5a947c2897743d57933ea713302f09cbae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25AE 7264 bytes

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