Malicious PDF — malware analysis report

Static analysis result for SHA-256 8437bfece24a504c…

MALICIOUS

PDF

61.3 KB Created: 2020-11-24 08:35:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7b73379276198162e796e37e31dd2bbc SHA-1: d93fcc4d52ba0c894995fdf8782c09647aa760dc SHA-256: 8437bfece24a504c68ba6d27e01a904e075b8874e420b4be4fef94150213f159
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://trafffe.ru/strik?utm_term=dpm+navajo+nation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5f9387e3ada11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408195/normal_5f9d50f375fb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455390/normal_5fb715c400701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476567/normal_5fa54c5649fe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5f91b8f61920d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_5f99e2693fe0f.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/henghuili-files/39349056855.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/dragon_apps_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/ase_p2_study_guide_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/18833325884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ed962a-84dd-48a5-8a32-388dc8331d46/raseposizidemukegogozi.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/jiresevile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fe0c756-51c8-4522-852c-872fae10d508/tefewuxoranexigeboso.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/80316136597.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/potato_recipes_for_dinner_veggie.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_off0000b59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59B 4792 bytes
SHA-256: 99f389f0a05990381db6ff5dc319db08feeb754a6acb7dc566ab9751f992cf23
font_01_sfnt_off0000c5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E7 10624 bytes
SHA-256: 5de4c56611a41ea15a7c5d661ff4583f5ca5880b6c64b8154bc25bfbbfc875e6