Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa6a8480295f5c4…

MALICIOUS

PDF

74.3 KB Created: 2021-03-22 00:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a20e489872408be7f79dd339e85f2ed3 SHA-1: 572304bfdec670eaa5c0a9c44ef80eded8b81030 SHA-256: 9fa6a8480295f5c4675f7e9d8261e9bcc6c0fd76b8d6f33d0767e5e1e0d83ade
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with a high risk score. It contains an external URI pointing to 'https://lozipotod.ru/123?utm_term=thomas+becket+school+northampton+uniform', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. No scripts were extracted, but the presence of external URLs and the high detection scores suggest the PDF is intended to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://lozipotod.ru/123?utm_term=thomas+becket+school+northampton+uniform
    • https://static.s123-cdn-static.com/uploads/4470687/normal_5fcb651e821a1.pdf
    • http://nofovukad.iblogger.org/vazadijodubabed.pdf
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/fikefib_momutololu_sevinofowo_jixaleje.pdf
    • https://static.s123-cdn-static.com/uploads/4380405/normal_5fe008ae485a8.pdf
    • https://wovitinukid.weebly.com/uploads/1/3/4/3/134372120/xorowetufapinole.pdf
    • https://static.s123-cdn-static.com/uploads/4385010/normal_5feb940ecb19f.pdf
    • https://topuzuxet.weebly.com/uploads/1/3/0/7/130739133/48987.pdf
    • https://static.s123-cdn-static.com/uploads/4479212/normal_5ff995ee36b8c.pdf
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/95708433f0.pdf
    • https://cdn-cms.f-static.net/uploads/4447885/normal_60258807b55a2.pdf
    • https://static.s123-cdn-static.com/uploads/4380210/normal_6008fcb2dd0a9.pdf
    • https://cdn-cms.f-static.net/uploads/4418381/normal_602efff1599e4.pdf
    • https://pozajuraxox.weebly.com/uploads/1/3/4/5/134591712/419d3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c76dfa28-b059-4fc0-9b2a-71feece69a2f/87011414843.pdf
    • http://xexotoj.epizy.com/2949121187.pdf
    • https://uploads.strikinglycdn.com/files/c1d4a9ce-9f80-48a8-99bb-e2c27b9736a3/36928678195.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e41b.bin
b06c808b734da277cc22174f7a12f6c78734d5aabbe58964e7168ae6241c4360
pdf-font-stream PDF embedded font (sfnt) at offset 0xE41B 5408 bytes
font_01_sfnt_off0000f64b.bin
268dc4eb321a1f1d03bcd681b31fbf7e57500d19231ce303f2f59341c8de4f9e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 11088 bytes