Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9273ba5482d8e9b…

MALICIOUS

PDF

45.0 KB Authoring application: Adobe PDF Library 9.0 First seen: 2020-09-24
MD5: ce551367e62a95c97081e4438c29fd24 SHA-1: d065df7fd72b3e2b1d2d239b05d1f885f8246e35 SHA-256: b9273ba5482d8e9bdb9b5035cc398c574b8c72b786fc9ca86a57c8664187c66b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a significant number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various external PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO poisoning to drive traffic to malicious sites. Although no scripts were extracted, the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://1hrloan.com/uploads/1/3/0/6/130639251/manubenopifif_zadevevewuf_zusuk_xoroze.pdf In PDF document text
    • http://fryingpanfoodadventures.com/uploads/1/3/0/7/130776263/5ffe271b.pdfIn PDF document text
    • http://sim-analytics.com/uploads/1/3/0/4/130476266/4486546.pdfIn PDF document text
    • http://keithgaryproductions.com/uploads/1/3/0/6/130604348/722292.pdfIn PDF document text
    • http://sligergames.com/uploads/1/3/0/7/130739253/bevovixurelabuvi.pdfIn PDF document text
    • http://myoffgridpower.com/uploads/1/3/0/2/130287482/matuti.pdfIn PDF document text
    • http://nuobeijing.devsite-1.com/uploads/1/3/0/2/130289386/130289386.html#blank+calendar+may+2019+pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5 8492 bytes
SHA-256: da5998192e50d66019ed8fb6617ada55d298a268d9dfe44563ede4118608d63f
font_01_sfnt_off00005ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA5 16724 bytes
SHA-256: 0fa3c1ee0e0cf94184ae42d1d8f1f4700b85a2f2e670c9620d3610160696c22f
font_02_sfnt_off00007551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7551 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04

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