Malicious PDF — malware analysis report

Static analysis result for SHA-256 3260565ab6e41d4c…

MALICIOUS

PDF

60.6 KB Created: 2020-12-06 16:10:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ef0a73e1d13402366f56dc0958f12420 SHA-1: 21410f0a2220103acb5d840e9a207b7e953b9a45 SHA-256: 3260565ab6e41d4cde2bdc3d0997eb3ac7a801f03a78270614bda91d3cd09ade
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The embedded URL is designed to lure users into clicking on it, likely leading to further malicious content or downloads. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://cctraff.ru/strik?utm_term=intex+10x30+pool+liner+replacement In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_5f94b13f24727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421208/normal_5fc54fc498589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5fb50e75361a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5fa5618e23785.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/5fc2830cc30a162e0c5caa26/t/5fcc2e2d920f47545b851cc4/1607216686179/23616729680.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2985d3dfdd95b60dfe79a/t/5fc5108418e72e5fdb783d39/1606750342074/introduction_to_multimedia_ppt.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe06019b1ed03538a17ba1/1606288901463/el_cuervo_edgar_allan_poe_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/piwusijixiretalenuba.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/tunsori_barbati_in_functie_de_forma_fetei.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee8def3361272aea999a/1606217357927/gidget_goes_hawaiian_dailymotion.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_off0000ae42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE42 5264 bytes
SHA-256: dd12a28d987a7fec398bb565610dd7f77b85b0ee88be240b8c4726eed6235c9f
font_01_sfnt_off0000c01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC01F 11180 bytes
SHA-256: 7acd5a55f5f8ddcc37ade008d7c173efa24bdc395190c2684d579226ebb344a2