Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96ad520e6ed8f0d…

MALICIOUS

PDF

35.6 KB Authoring application: Scribus
MD5: fdc43e4e6f2936c7ed41dd64e0152efc SHA-1: 2a5b534305b965289a43da2682dc9f241093392e SHA-256: c96ad520e6ed8f0dd1c54c29c5f28911782981f5fc936430bfe0e62cb53da2c4
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 links to external PDF documents, a technique often used for SEO poisoning or phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The primary attack pattern involves directing users to a link farm of potentially malicious or spam content.

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://fitiga.voronezh-reshenie.ru/uploads/2020/01/28/4a084b4ba4.pdf
    • http://riversplusguiding.com/uploads/1/3/0/5/130550769/4cc84.pdf
    • http://offerup-item-details9480298.com/uploads/1/3/0/6/130605124/96e265b56.pdf
    • http://bethlehembaptistchurchsaginaw.com/uploads/1/3/0/6/130620836/dowopow.pdf
    • http://psykhepress.com/uploads/1/3/0/3/130323762/5750529.pdf
    • http://tacodelcampus.com/uploads/1/3/0/3/130323836/butonewot.pdf
    • https://vogizojosuw.weebly.com/uploads/1/3/0/4/130483513/7931786.pdf
    • http://stmarysautorepairandsales.com/uploads/1/3/0/6/130639933/8040115.pdf
    • http://rowanlestat.com/uploads/1/3/0/5/130590532/7862260.pdf
    • http://bernardobellostudio.com/uploads/1/3/0/5/130539518/130539518.html#made+in+abyss+elevator

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ec.bin
1622bbd5aa1bce11f09d9b43c81ddee4a45b5e02cd9ff60b0902e4f89f553968		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC 7968 bytes

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