Malicious PDF — malware analysis report

Static analysis result for SHA-256 570f118e3b3c8844…

MALICIOUS

PDF

32.3 KB Authoring application: QPDF
MD5: 2ad922dbdf98c51e39606c972296407e SHA-1: 0caca1e369e0e769e52e78f0b03585aef03dad22 SHA-256: 570f118e3b3c88441e80a12b3b9f2305c7db72a68c49d08789041d089708bc9a
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files on various domains. This is a common technique for distributing phishing content or redirecting users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature. The embedded URL action in the PDF object also explicitly lists one of these domains.

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://absolutely-coraldee.com/uploads/1/3/0/3/130379426/7268385.pdf
    • http://nickmosca.com/uploads/1/3/0/7/130776629/d15e48d2e59.pdf
    • http://unclejohnny.net/uploads/1/3/0/6/130605115/97af92394e61.pdf
    • http://triosreadydentallaboratory.com/uploads/1/3/0/3/130379216/d47886.pdf
    • http://zanchettinbrothersterrazzo.com/uploads/1/3/0/7/130776452/16d88ccb35645ac.pdf
    • http://animeblogger.org/uploads/1/3/0/5/130551607/4fdcf62decc9.pdf
    • http://www.vermontbatcenter.com/uploads/1/3/0/7/130776805/vifizenatasezujet.pdf
    • http://allthingsandre.com/uploads/1/3/0/7/130739254/10b58f0f7.pdf
    • http://www.pinkbatmotorsports.com/uploads/1/3/0/7/130738639/824c947cf1d46.pdf
    • http://alfordtech.com/uploads/1/3/0/4/130489072/ac776348.pdf
    • http://host244.carmichaelnl.com/uploads/1/3/0/6/130621934/130621934.html#html+upload+file+type+restriction

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000027e6.bin
cc018ef6f0fa796400c61ef3e7b9855652c1ba8ca6c1448b550134e45916951c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27E6 7984 bytes

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