Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ad6b744feff496…

MALICIOUS

PDF

51.2 KB Created: 2020-06-07 07:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5058331dc4374e06bc5d18ebf76cb9d SHA-1: 362fa6c29f2d240f0f200fdbd23f8b969daae7fe SHA-256: 26ad6b744feff496164fa6596c6899ddfcb145e733d832de359e3e0e13ed0d34
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs point to various domains, suggesting a link farm designed to distribute malicious content or phish for credentials. No scripts were extracted, but the structure and heuristics point to a delivery mechanism leveraging external resources.

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://creamysensations.org/uploads/1/3/0/8/130813042/130813042.html#convers%25C3%25A3o+de+bases+numericas+exercic
    • http://yourchoiceclinic.com/uploads/1/3/1/4/131407283/kazefabif.pdf
    • http://somesaltmorecinnamon.com/uploads/1/3/0/2/130288883/85509a15adfef6.pdf
    • http://jllcapitalmarketsriverwalk.com/uploads/1/3/0/7/130776854/nigub-dopavukezimun-fewawexudeji.pdf
    • http://draftinginoc.davidmichaeldesigns.com/uploads/1/3/1/4/131409474/1828257.pdf
    • http://ourhairstories.com/uploads/1/3/0/4/130476143/tizuzubido.pdf
    • http://julianrouth.com/uploads/1/3/0/3/130323693/jalusojukaget.pdf
    • http://cpanel.dytrivia.com/uploads/1/3/0/9/130969153/9580353.pdf
    • http://mta-sts.mx.andystreessf.com/uploads/1/3/1/4/131455232/mewamanivit_petotejid.pdf
    • http://heidiwinfield.net/uploads/1/3/0/8/130813860/7334358.pdf
    • http://74-123-76-237.mgwnet.com/uploads/1/3/0/6/130639703/d0ca019.pdf
    • http://ballpestconsulting.com/uploads/1/3/0/4/130488251/0419fedd057.pdf
    • https://vebujeko.files.wordpress.com/2020/06/fezulona.pdf
    • https://batuzax.files.wordpress.com/2020/06/37103293634.pdf
    • https://jorasemop.files.wordpress.com/2020/06/fuxipunozebuladifodawav.pdf
    • https://miwobulaj.files.wordpress.com/2020/06/logito.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_off000093a0.bin
2825d6beecc817ea8a5da249e2d47c2f1492dd3a9b1c3b0d5207f41fd1fd403c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 14372 bytes

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