Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bc5be2bc1c2288…

MALICIOUS

PDF

41.4 KB Created: 2020-04-15 00:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 886ae7ecd09d73d0310a958a7d3117e7 SHA-1: b5575d71aa78862a16aed542cdaba2949475aad3 SHA-256: 61bc5be2bc1c2288dcce0c5ca48f8511164655babd3f0e0bf75dcc4666b057f7
96 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as PDF files, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this behavior. The document body, though heavily obfuscated, contains text that appears to be a financial audit report, serving as a lure. No scripts were extracted, but the presence of many external URLs points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://ryanevansrealty.com/uploads/1/3/0/2/130270911/130270911.html#ejemplo+de+informe+de+auditoria+interna+financiera
    • http://amandalund.com/uploads/1/3/0/3/130313340/07d3e34e4d202.pdf
    • http://pushinink505.com/uploads/1/3/1/0/131070652/9235752.pdf
    • http://bryncurtjameshammond.com/uploads/1/3/1/4/131453984/wogudi-tibupapajufani-duzuneros.pdf
    • http://jennifernyczconner.com/uploads/1/3/1/3/131380354/db96a.pdf
    • http://relaxandrecharge.us/uploads/1/3/0/5/130551115/08ec699b4aa662.pdf
    • http://opentointerpret.com/uploads/1/3/0/9/130969339/bizidatofenesidoxeza.pdf
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076a8.bin
c32d6fc8fba9835d8342e977c5d6194ae7e5671a8520d510860726b6ba86032c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A8 9164 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.