Malicious PDF — malware analysis report

Static analysis result for SHA-256 69996ad0b425f28d…

MALICIOUS

PDF

73.6 KB Created: 2021-01-23 11:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 31b5391fcfdf9627fd78bb774c192494 SHA-1: 2ed74fbdf695db840c27595d9886f5383d1f6764 SHA-256: 69996ad0b425f28d61382f682c47199eb3a013f60badb70160b15e3a993f57c7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a domain associated with phishing and SEO link farms. ClamAV detection and ML classification strongly indicate malicious intent, specifically a phishing or trojan payload. The document body, though heavily obfuscated, appears to be a lure related to 'Downton Abbey', suggesting a targeted social engineering approach.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jottigo.ru/123?utm_term=downton+abbey+season+1+episode+3+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5fda19d5a8b2c.pdfIn PDF document text
    • https://sejimewopokotas.weebly.com/uploads/1/3/5/3/135350214/nuzufe.pdfIn PDF document text
    • https://site-1177946.mozfiles.com/files/1177946/descargar_antivirus_gratis_para_android_2018.pdfIn PDF document text
    • https://febotobelem.weebly.com/uploads/1/3/0/7/130739539/monata.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/jasipefulaxiduj/78323574065.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/chrome_os_iso_for_chromebook.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/library_automation_system.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/beta_hcg_report_0._100.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/3092832249.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/57648273171.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/beats_studio_headphones_wired_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/rejad.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/95021697877.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/matuvosalulapekepame.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_off0000e304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE304 5620 bytes
SHA-256: f3f009078a0a53419c4b8a4d1eb191a8575b3640648111a54f160b9e823897d3
font_01_sfnt_off0000f62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62F 10364 bytes
SHA-256: 020a817e41102db5be07c341941dc4b2c2efbc81a3f59b817e2b3eb39a5baf55

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