Malicious PDF — malware analysis report

Static analysis result for SHA-256 044fdd606465cd45…

MALICIOUS

PDF

29.8 KB Created: 2020-05-27 12:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43cc2d440fe83c0ac2e30127f723c957 SHA-1: 5bbfadb449bc44cea932d501260412a88cbcc174 SHA-256: 044fdd606465cd4596322c2312beec7ef3581a3ec4da33974be7601093a7b2bd
96 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF_URI and EMBEDDED_URL heuristics indicate the presence of external URLs within the document body. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://775marketing.com/uploads/1/3/1/3/131384254/131384254.html#still+hurting+free+sheet+music
    • http://blackdogpest.com/uploads/1/3/0/2/130270740/lagenamexu_renexegejanesif.pdf
    • http://calyxhomeopathy.com/uploads/1/3/0/9/130969830/a50fbebac416.pdf
    • http://author-evapasco.com/uploads/1/3/0/4/130490314/87ccd00546.pdf
    • http://roanokedentalcare.net/uploads/1/3/0/2/130272233/zabifu.pdf
    • http://jannproperties.net/uploads/1/3/0/5/130588842/pabafesiwor_mozokojinupeje.pdf
    • http://freedomgear.shop/uploads/1/3/1/0/131070678/c0331d9d34bd178.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047c5.bin
9fa621a0b3fedc850f77a56ab7b5baec1dfdf5849cf0973a4a08d3e51df5092f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C5 10772 bytes

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