Malicious PDF — malware analysis report

Static analysis result for SHA-256 721c0d05af39f73b…

MALICIOUS

PDF

69.8 KB Created: 2020-12-19 02:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a5208c7a03324a2a6f85859a1679b91d SHA-1: b5e24fc1facc3b6ab4ffdc867a3ce8c8840a399f SHA-256: 721c0d05af39f73bb42979235a7de4f50f7d0015e54f6b36136d66f08af0f343
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external links, with one pointing to a suspicious URL that appears to be part of a phishing or SEO spam campaign. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=what+is+mixed+spice+in+australia PDF link annotation
    • https://pemolopudamas.weebly.com/uploads/1/3/4/7/134753943/fizet.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/5fbcfccf79c08c7f2b9efe95/1606221022478/logaritmo_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a0f6a7-208d-433f-844c-60d75da70547/rerisoduse.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc392926b97992eb56ca04e/t/5fccd4cf9aa2de0c64920e10/1607259344580/live_stream_catholic_mass_today_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/76295242538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0498203-c92f-4cf8-a845-4673f574a64c/vipeximewutosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d99458-233b-4dd1-be0f-98e84ff146de/94971285075.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/simple_website_templates_in_html_free.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/pejunusutowepikiserix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c781c89b935f15ddc3c4/t/5fce5be824c49707d3519565/1607359467109/duck_hunter_funny_game_free_download_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/korobo.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/63674559012.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/33165002754.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/gilikexeliwigokagafo.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_off0000d3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F3 5396 bytes
SHA-256: 6ca3c59e8e90e63ad884dc5589c79717bca00725c0492b934326791598028e10
font_01_sfnt_off0000e62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62F 10808 bytes
SHA-256: ad235dfd2965cf3f934aa19598da0840a4dedce0d7512da4577b47b037e39c3e

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