Malicious PDF — malware analysis report

Static analysis result for SHA-256 1135d79788e61b3c…

MALICIOUS

PDF

35.3 KB Authoring application: LibreOffice
MD5: ba86fd8fb8ce93b9baa94dd9af3578d4 SHA-1: 7c94641b35d2f929067e86c694fccf7eebe80205 SHA-256: 1135d79788e61b3c117ed96513996bb47875d9a7a7db4de679e75a3b50ec1313
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF file contains a large number of embedded URLs pointing to external PDF documents. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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://officialgoodboys.com/uploads/1/3/0/4/130483443/1232285.pdf
    • http://ourlittleflowers.com/uploads/1/3/0/6/130621530/6001437.pdf
    • http://aveh.com/uploads/1/3/0/6/130604804/zirizopabiramix.pdf
    • http://uitests.com/uploads/1/3/0/5/130542865/297f66920a.pdf
    • http://getadvantage.in/uploads/1/3/0/5/130545985/d23a533308006d.pdf
    • http://onlinewebcammodels.com/uploads/1/3/0/6/130621607/718261.pdf
    • http://jumpingpaws.net/uploads/1/3/0/3/130312957/bupaduso_resipoda.pdf
    • http://ginettelaw.com/uploads/1/3/0/6/130639877/344745.pdf
    • http://atheistpolice.org/uploads/1/3/0/7/130776795/ec790a.pdf
    • http://cubcountry.org/uploads/1/3/0/5/130551140/0908c.pdf
    • http://pricedestroyer.com/uploads/1/3/0/7/130775940/6847443.pdf
    • http://cpanel.jessicamiyuki.com/uploads/1/3/0/6/130604227/130604227.html#leadership+theory+and+practice+northouse+ebook

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003050.bin
648ba6df671ffac7b7d7c865d86d669119405659740b38cfab4a5a137e7bb004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3050 8908 bytes

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