Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03023dc99a0ba11…

MALICIOUS

PDF

69.9 KB Created: 2021-01-16 01:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a683147ba1006ede85b87166902cd3e9 SHA-1: 7b4914e5eb794b72e6f1915fee8203f7ad11d19d SHA-256: c03023dc99a0ba11d23c6d1df7ded56efd9c30116d310a48cdb2e40943d0c94f
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The PDF structure itself does not contain executable scripts, but the presence of the malicious URL and the detection signatures strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=image+map+photoshop PDF link annotation
    • https://site-1253273.mozfiles.com/files/1253273/92124028886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f9d46ef087d1.pdfIn PDF document text
    • https://site-1253958.mozfiles.com/files/1253958/cadet_college_swat_uniform.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_5f9fa609c9e9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368746/normal_5fcd52551622e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5f8f492b3a65f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475000/normal_5fc84483994d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_5fd7106b7573c.pdfIn PDF document text
    • https://site-1203881.mozfiles.com/files/1203881/human_life_expectancy_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464327/normal_5fbb7828eb0ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402014/normal_5ff7d3e404b47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418981/normal_5fc389d81abf3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74C 5044 bytes
SHA-256: 1318be489d5fb23da2f4533eb644179beed8d06a96f79c3defe4fb0ecdb87b44
font_01_sfnt_off0000e850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE850 10280 bytes
SHA-256: 741babe2deb1f9789e1fe1813db7f98075b054c52fd129f9e67a488e0f232927