Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48bca7cc4b6e9bb…

MALICIOUS

PDF

40.9 KB Created: 2020-05-30 08:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 954fc2d11fdf066f9b7e758836a998de SHA-1: 41fe88759658f4135aad9a002e8af3271b5ee00c SHA-256: d48bca7cc4b6e9bb1c99c11a01b7419ec4b724fc7e591d766f65cd9a6ce37315
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, with several pointing to suspicious domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or redirection tactic. The document body contains garbled text but also includes the URL 'http://74-123-73-74.mgwnet.com/uploads/1/3/0/6/130640070/130640070.html#toned+in+90+days', which is also listed as an extracted URL. No scripts were extracted, limiting the analysis of direct malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9671

Heuristics 4

  • 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 http://74-123-73-74.mgwnet.com/uploads/1/3/0/6/130640070/130640070.html#toned+in+90+days PDF link annotation
    • http://tabbiescleaning.org/uploads/1/3/0/8/130873860/mevitegaze.pdfIn PDF document text
    • http://protocelantioxidant.com/uploads/1/3/1/8/131856584/3317317.pdfIn PDF document text
    • http://careneeds.org/uploads/1/3/0/6/130620626/liragimemabenun.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E7 10932 bytes
SHA-256: 4020c2a992f898fc27a088018a81926e609e3d418e4272927a405ba56c34911f

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