Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca22e9e432b6487…

MALICIOUS

PDF

57.4 KB Created: 2020-12-11 16:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a47c0969311794530835569e89d89e25 SHA-1: 590f26b3daa4a0653df98aef45f3432fc94d08e0 SHA-256: eca22e9e432b64876b8dd0ec2ea0844db6b8f3d76a3a2840e69bcb67a1d9fd86
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent. Although the document body is heavily obfuscated, the presence of a malicious URL suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=french+oral+exam+rubric In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5fa566152a159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f86f9aa59a80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482190/normal_5fb6d0996443f.pdfIn PDF document text
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/tofukerosizipukofil.pdfIn PDF document text
    • https://jaduxopedarev.weebly.com/uploads/1/3/4/7/134749363/2172746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fd0f1954c7f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427093/normal_5f9a6485596eb.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/nanes_xaxoxaboba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420036/normal_5f9dc94679fed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5d95bbdb33045eee4110e/t/5fd23336b0f0f842d7b13703/1607611191134/36857970429.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc587ece2fce462bcab511b/t/5fcfb771ba7003536eb8201c/1607448434795/9134641921.pdfIn 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_off0000a6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E6 5024 bytes
SHA-256: 64163409b43841c26ab439dee1b763b2b29a9f710dc5d8da22c92c7371eaab89
font_01_sfnt_off0000b7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D9 9856 bytes
SHA-256: f384ee9622fda7f9a97bde4003ea2e0929a2009abb4cc55c10743c3137cbb8d2

Open this report in the interactive analyzer, or submit your own file for analysis.