Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb71e66dd4882a72…

MALICIOUS

PDF

46.9 KB Authoring application: Adobe PDF Library 9.0
MD5: df573d9e24cd65de48103aac94658b5b SHA-1: 50b4bb2fc0de6f871715d828a7c68d0e1b194c97 SHA-256: cb71e66dd4882a727c518dff3316784cd66478e6ea195794ba709301258e2e86
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, forming a link farm, which is a common technique for distributing malware or directing users to phishing sites. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, while containing garbled text, mentions 'Goodnotes bullet journal template 2018' and includes numerous URLs, suggesting a lure to disguise the malicious nature of the document and redirect users to potentially harmful content.

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://datainaction.weebly.com/uploads/1/3/0/6/130603917/fc8c4016c4ad2.pdf
    • http://tegur.photographer-sevastopol.ru/uploads/2020/01/28/komisu_wivujimimifixok.pdf
    • http://cleaningservicesresidentialcommercial.com/uploads/1/3/0/6/130620391/9ef724d.pdf
    • http://vegetablejewelry.com/uploads/1/3/0/5/130539428/zevadawuxe_zizigo_ligeweb.pdf
    • http://donnamalonescience.com/uploads/1/3/0/2/130289417/43fade1e2de.pdf
    • http://chromationspec.com/uploads/1/3/0/5/130588531/somemun.pdf
    • http://tarifgo.de/uploads/1/3/0/5/130589261/takizug.pdf
    • http://drbarrnd.com/uploads/1/3/0/5/130543488/7536188.pdf
    • http://kojiwe.svetofot.ru/uploads/2020/01/28/niripedugotamubawa.pdf
    • http://cammontv.com/uploads/1/3/0/6/130639510/e60697.pdf
    • http://nuohotel-zh.devsite-1.com/uploads/1/3/0/7/130740116/130740116.html#goodnotes+bullet+journal+template+2018

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012bc.bin
f4936741583a5f96f7f529f251f0581900c679dc6a4040a620566698df186e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC 8292 bytes
font_01_sfnt_off0000678d.bin
22cd034339abe83ef100088c344c397d43dbcb1a696a587bbc5f11ca204a751f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 16204 bytes
font_02_sfnt_off00007c89.bin
87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C89 2596 bytes

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