Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb5a743f62d5098…

MALICIOUS

PDF

74.1 KB Created: 2021-02-15 14:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3ac87926bb10166ac39acfd83bc2efe2 SHA-1: 9664f103c2ff14f985df1f649b65fb24435ee8c5 SHA-256: edb5a743f62d50988f82641af9b9c739acc3bb245d0cff94a4bb24f933d36495
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://druttle.ru/strik?utm_term=m-audio+oxygen+49-key+usb+midi+controller PDF link annotation
    • https://cdn.sqhk.co/veletafi/hGhgibQ/jabisoxam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458849/normal_5fc7d8912cea4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fce0139ce9a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420765/normal_5ff3943f7b7f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_6021abab66de0.pdfIn PDF document text
    • https://cdn.sqhk.co/wiparodub/bhjib08/modern_warfare_3_xbox_one_digital_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493198/normal_600b3bd7436d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5ff52a15daa21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421466/normal_5fecc60a3df5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501989/normal_5ff14e6bda11f.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/aWhcwih/amazon_seller_central_customer_service_phone_number_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/GTAbnid/32055847814.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379500/normal_5fe0cebe41783.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/dgiihja/94451836873.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/migudij_dufaka.pdfIn PDF document text
    • https://rakulemiz.weebly.com/uploads/1/3/2/6/132682689/gugodolisikebod.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/ZjbXiib/vujelupatagu.pdfIn PDF document text
    • https://remurefovedelag.weebly.com/uploads/1/3/1/8/131860204/839051.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 5912 bytes
SHA-256: f523d29857839bdb45f6997ec328823406591dcafa7c9fe7163bc150e88420bd
font_01_sfnt_off0000f43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 10992 bytes
SHA-256: 73fa44cb64f4b4f9282ffb99aa344cd8c37b872146d05429daccdfd0f7fae021

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