Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a81a8c76f92b6d…

MALICIOUS

PDF

73.5 KB Created: 2020-12-30 18:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1bd450e6e58b68b9f50753c147983a46 SHA-1: 91734d9f3d89983ec1fd4e6ca721ebc415ad655a SHA-256: e8a81a8c76f92b6da6165f8070c3c6f61d08fc917d81066628e834f9350f980c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/strik?utm_term=best+dual+monitor+stand+for+27+inch In PDF document text
    • https://cdn.sqhk.co/disegivoji/Hgh4hjf/36713050423.pdfIn PDF document text
    • https://cdn.sqhk.co/bewiviki/60jcsid/cut_it_out_cutters_etsy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5fde2a95e46dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/91624266828.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/1847758276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de2a5cb-bfad-4299-a091-54959d44a3ff/24587072596.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/algebra_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/itc_handel_gothic_arabic_font_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd673732-4690-4c78-845f-9eed22ea5db7/23132210302.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/servidor_webdav_android.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_off0000e3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C8 5520 bytes
SHA-256: 9e664d89c204cdaecf88da7a73af8b2a9df9c37276aa66d7a6ab7a8c87912298
font_01_sfnt_off0000f66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66F 10260 bytes
SHA-256: eac8bcbd0cb03c8d7e2f55bb2a6d9831dc22d70585edaed230e2dfc63c098fb2