Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2b7ab284ff977f…

MALICIOUS

PDF

36.1 KB Authoring application: Karbon
MD5: cec5ab165d972b025338327771114a84 SHA-1: d3bd5918bc4aa4e99e373915857de9c6ff709b2c SHA-256: 2c2b7ab284ff977f92be311ea7701052a23687ca81d71054849f0122bd9bd6e2
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified as a link farm, which is a common technique for phishing and malware distribution. The document body explicitly mentions 'Bloodborne pc iso' and provides multiple links, suggesting a lure to download a game, which is likely a pretext for delivering malware. The ClamAV detection and ML classifier further support its malicious nature.

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://cranfordfishstand.com/uploads/1/3/0/2/130270918/8003238.pdf
    • http://miles-of-trees.org/uploads/1/3/0/4/130476917/tudajodevexis.pdf
    • http://jatel.vpalatke.pro/uploads/2020/01/28/4672679.pdf
    • http://carbuzzznproductions.com.au/uploads/1/3/0/4/130436188/nexujare-topeve-pijoreki-ratizakefowad.pdf
    • http://ymagofficial.com/uploads/1/3/0/4/130476192/194747.pdf
    • http://gon.promalpkrd.ru/uploads/2020/01/28/3675993.pdf
    • http://chuckwilkins.com/uploads/1/3/0/4/130436121/4509878.pdf
    • http://spectrumsignscalifornia.com/uploads/1/3/0/5/130540197/130540197.html#bloodborne+pc++iso

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001138.bin
d444715f9d8ee91b5002bc1e4945223874b620826f4dd19ae82587dc9cac71d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1138 8160 bytes

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