Malicious PDF — malware analysis report

Static analysis result for SHA-256 825ec2680b87e2aa…

MALICIOUS

PDF

36.8 KB Authoring application: Karbon
MD5: a334b6a4c9d87eba6292cbc63380df0d SHA-1: 87aeb6d4094a80afefc27b442daba47786bddc3a SHA-256: 825ec2680b87e2aa0e7c61514d033d664f81454f607c9eebdd7660703c714ffe
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness. The embedded URLs, such as http://dogmoda.club/uploads/2020/01/27/5cb0ec077c01235.pdf, are likely part of a phishing or malware distribution campaign. No scripts were extracted from this sample.

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://dogmoda.club/uploads/2020/01/27/5cb0ec077c01235.pdf
    • http://dekidex.promo8.ru/uploads/2020/01/27/1313578.pdf
    • https://ruvotojizojige.weebly.com/uploads/1/3/0/3/130323210/23aaac07c.pdf
    • https://jupedisa.weebly.com/uploads/1/3/0/5/130541763/460457.pdf
    • http://vekakevila.kuhni07msc.icu/uploads/2020/01/27/zigoxekirejomes.pdf
    • http://remoxow.n26-acces-enligne.com/uploads/2020/01/29/9584049.pdf
    • http://xaditidoz.kavkaz-car.ru/uploads/2020/01/27/pezujizujesoda.pdf
    • http://jevolare.paypal-support-limitted.com/uploads/2020/01/27/4864186.pdf
    • http://chefsaba.ru/uploads/2020/01/27/9caa236c0.pdf
    • http://badasscoinrings.com/uploads/1/3/0/4/130488983/sozaku.pdf
    • https://viveramomugob.weebly.com/uploads/1/3/0/5/130588270/ridulize.pdf
    • http://bolsterrogers.com/uploads/1/3/0/4/130476821/130476821.html#calefont+splendid+master+10+litros+manual

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012a6.bin
3877b12872109e87164c13ec6e9761fc8f1898483e91877ae1bd884b8b045121		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6 8924 bytes

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