Malicious PDF — malware analysis report

Static analysis result for SHA-256 20593b9ef1ab59d7…

MALICIOUS

PDF

69.3 KB Created: 2020-12-17 21:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 409b48b9703ff41502d74d57dbda3d67 SHA-1: dc9416eb2c9674266fdf4f24e9e436f02b92177f SHA-256: 20593b9ef1ab59d79218d25d224c8864a04d73efed88dae0dd07764351b91d99
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The presence of numerous embedded URLs, many pointing to unknown or potentially malicious domains, strongly suggests a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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.
  • 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://traffking.ru/123?utm_term=what+sorcery+is+this+quote In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450440/normal_5fc59cd4e1518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f881b85dcd5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487424/normal_5fd84edf8ee29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f9d025281424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368221/normal_5fcb9ffee2361.pdfIn PDF document text
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/bae4bf046d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5f98070237f11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f9914d17698f.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/libowebujakux/bwv_121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/699736d8-f707-4d2a-acf6-ee1b79197037/fuleravoseximatav.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_off0000d32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32C 5096 bytes
SHA-256: e95e944712fc04de359362b696af87521b47878b6d47f0bc8bf7b1dfd2b15690
font_01_sfnt_off0000e493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE493 10792 bytes
SHA-256: d728035ecaaebdfe4e04d6bd4e40d74da2cf1774767e35b5795d54ff382e8bab

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