Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e38fd0870eaad4…

MALICIOUS

PDF

57.6 KB Created: 2020-12-01 01:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cef41cc529b3a2e7a9a680f7e415aae7 SHA-1: a9a194dc01c3297c9b40ed505ce2397b57d2eff1 SHA-256: 92e38fd0870eaad494a938a9a3e264b5f6e7be093249b0f74d6482109cac3d40
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant portion pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://traffset.ru/strik?utm_term=mega+man+fireman+sprite PDF link annotation
    • https://pusobufuronuwu.weebly.com/uploads/1/3/4/4/134475569/savozesikilo.pdfIn PDF document text
    • https://xiwodaboxidedu.weebly.com/uploads/1/3/4/6/134647922/5ef363458d.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/5fbce344be7cfc36344e8aaf/t/5fbdf2ffe18c5c478ec0dcb6/1606284034363/lined_seahorse_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/ramolaxewesojivusajakuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf54c8e6d49a06bb88c3e5/1606374606159/wibegoguxovobulewelavot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd37eb804c47284cebbea9/1606236144832/1861358972.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf62d8f3de5e49b55c469c/1606378200967/25079472269.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea1fa8793968640865e0/t/5fc49ab49b1ed035386fb6a1/1606720181073/zoom_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/miter_saw_workstation_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ed63be-95a6-4465-8382-f7e9481c29bc/motuginakujirati.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_off0000a6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C0 5192 bytes
SHA-256: f8e10ab384e0c60564f5bf54734cc8ea8691cefe1dc31b33aef0e007493232c0
font_01_sfnt_off0000b867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB867 9904 bytes
SHA-256: f0c0029c12a73f7f55514f93b52fdc68a4dabe4299c34e87928aa736d47fad53

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