Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ea9857b7cb17d8…

MALICIOUS

PDF

40.2 KB Authoring application: Serif PagePlus
MD5: 1d8c07a5ae46305b6f2ec856cd350a7c SHA-1: 215459378018d944848f3d02c96769be94b87c56 SHA-256: 95ea9857b7cb17d879c3125d5db5cf83575da137b7521a04be4ad986e0e081f4
150 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. This behavior is indicative of a link farm used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs likely serve as lures to download further malicious payloads.

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://primeamazon.net/uploads/1/3/0/6/130639933/2a0fd3bb45.pdf
    • http://roamartrentals.com/uploads/1/3/0/2/130289589/8923949.pdf
    • http://boxedandpotted.com/uploads/1/3/0/2/130289809/tabuzipezikejalogip.pdf
    • http://2005viper.com/uploads/1/3/0/4/130435748/povekidafulev.pdf
    • http://missfoggscience.com/uploads/1/3/0/7/130775700/limukixitezoni.pdf
    • http://wojor.cashopros.com/uploads/2020/01/29/powika.pdf
    • http://planinskivitez.weebly.com/uploads/1/3/0/5/130543483/1206132.pdf
    • http://o2smallhouses.com/uploads/1/3/0/7/130775192/5aa414.pdf
    • http://artcenterla.com/uploads/1/3/0/5/130590356/ca9c922c60f.pdf
    • http://asociacionperiodistaspr.org/uploads/1/3/0/5/130542964/130542964.html#physiotherapy+brachial+plexus+injury

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011a5.bin
59e7095fd9f05f91f910adc380421ac2d3e38f758de86510ad1e2fed936073c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5 8152 bytes

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