Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba4ac7058f4f536…

MALICIOUS

PDF

69.0 KB Created: 2020-11-11 10:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 78403dbad226372e8082aecaa5e433e8 SHA-1: e6b84a7c78e74078b63c65d92bbfd58c5765abff SHA-256: cba4ac7058f4f536d2266d1698f794ceeb1750de8765c3019b95d169aa0aff73
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 infrastructure, disguised as a manual for a medical device. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://ggtraff.ru/strik?keyword=respironics+everflo+q+concentrator+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5f8d2d0e7d537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5fab6f31d121f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_5fa1c1c66e7be.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/widofafane/71833476264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b090dcb-889d-41e3-901e-d477716abdf2/bujaxajejapijanimiwomij.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunoje/profemin_customer_service_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/culinarian_ff14_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/unit_5_vocab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/recycle_bin_cart_with_wheels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d5be357-9b84-4338-986b-d2146366da17/saf_solutions_llc.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_off0000d235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD235 5356 bytes
SHA-256: 9d6c6ce8528a5c6bc7ea0612819b0902677bb5a330b336cf1ad1a02ac56a169f
font_01_sfnt_off0000e465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE465 10224 bytes
SHA-256: 5dd8ef625cf529cc070f5d553b534aca90f54c6dec229a5507fd5715f1e96b27