Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4e698ecbdde16d…

MALICIOUS

PDF

79.0 KB Created: 2021-03-01 03:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 179e115a0f7b8295a4f7b3997a0080ba SHA-1: 5a5c7a3c2e4ed2766af1b78cb5db0651b93983bb SHA-256: 4e4e698ecbdde16d01550b1f5ad4c6b7dd1b303ea9742c1c72d08dca07f6ea2c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and other domains, indicative of a link farm or a method to distribute further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful sites.

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://resalured.ru/wix?keyword=chittenden+humane+society PDF link annotation
    • http://vifuwala.iblogger.org/73184079565.pdfIn PDF document text
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/57ab50f2490.pdfIn PDF document text
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/b39059710.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/dobesogum/pimumedumix.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/figurepadejiraki.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/gafebekorumiwefiperavir.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/83627674082.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/japoraxunagogagilewupam.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/fikepigorabunubaze.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/69384391980.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_off0000faf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 5060 bytes
SHA-256: 120125514ccd2524b4967bed03d74b032b9d87ee16c919462c144d1f1d897cfb
font_01_sfnt_off00010c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C03 10416 bytes
SHA-256: ac186f4b924203577e02614f05c1ae0e84f4d3da86fbcaff2f046d66e9f0c7dd

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