Malicious PDF — malware analysis report

Static analysis result for SHA-256 41599306a0026e8e…

MALICIOUS

PDF

42.0 KB Authoring application: pdf-parser
MD5: 27ca2c244c4bb4961b863d12d71c9bdd SHA-1: b252566f4ffbc2df2e1480a515443680397cee8c SHA-256: 41599306a0026e8ea4cf6160d92fb439553118a1ba43029e89c380d637e8b80d
152 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, which is a common technique for distributing malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output further confirm its malicious nature. The embedded URLs likely lead to further stages of infection or phishing attempts.

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://peb.bestperles01.fun/uploads/2020/01/29/1925558ba.pdf
    • http://gakobi.stapmstore.ru/uploads/2020/01/29/jexoxo.pdf
    • http://pilatesperformancetherapy.com/uploads/1/3/0/5/130551839/5dc5afba54.pdf
    • http://bellaircondominium.com/uploads/1/3/0/5/130550800/tofumisujamo.pdf
    • http://wavtrainings.com/uploads/1/3/0/5/130545485/luvuwumejibepujekuri.pdf
    • http://sweetlifepilates.com/uploads/1/3/0/5/130589431/9921941.pdf
    • http://beje.wellsonlineserviceverifications.biz/uploads/2020/01/28/6224185.pdf
    • http://laniertechsolutions.com/uploads/1/3/0/5/130588861/7874065.pdf
    • http://zube.0406shopps05.fun/uploads/2020/01/28/9576054.pdf
    • http://sophiascheffel.com/uploads/1/3/0/5/130590108/130590108.html#exercicios+de+termometria

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000132f.bin
086df87500d0d9b1286b707289b30d69accda997aaab74e27428dbab1b28ee0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132F 12372 bytes

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