Malicious PDF — malware analysis report

Static analysis result for SHA-256 1619b192b9824d99…

MALICIOUS

PDF

40.6 KB Created: 2020-04-13 14:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 95bd1ef3949881c1d4f9004019919e67 SHA-1: 6f08bfc0dc67adbcb9cc4e9784661909186c4f05 SHA-256: 1619b192b9824d99fd12b8305b589ab9f06f4b13e983b2cf5d4ea5cd3e9a92fa
96 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which appear to be part of a link farm designed to host malicious content. The document body, though partially corrupted, contains a URL that mimics instructions for activating spell check in Word, likely a social engineering tactic to entice users to click. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host and distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ductcleaningdc.com/uploads/1/3/0/4/130488338/130488338.html#como+activar+el+corrector+ortografico+word+2010
    • http://mapavingandmasonry.com/uploads/1/3/0/5/130543092/fivojewilexo_vinadidegikux.pdf
    • http://westarnllc.net/uploads/1/3/0/4/130477090/2255482.pdf
    • http://ukdetailersandvaleters.com/uploads/1/3/1/4/131454237/widifedakarejuvovu.pdf
    • http://garyorr.design/uploads/1/3/0/2/130272524/zagadalapi.pdf
    • http://hollywoodp3.com/uploads/1/3/1/3/131383607/8487521.pdf
    • http://sektor44.com/uploads/1/3/0/4/130483513/d6ea148fce.pdf
    • http://lonislandpictureframe.com/uploads/1/3/1/3/131381044/b916eacd9.pdf
    • http://dedika.org/uploads/1/3/1/0/131071159/samexibejesare.pdf
    • http://leonorriesdesigns.com/uploads/1/3/0/3/130323148/rufukulugakomegare.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_off000073bc.bin
387903782811071cd245b8d64abe957daa56e21058ed66ad7bd84e7592b04e09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73BC 9128 bytes

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