Malicious PDF — malware analysis report

Static analysis result for SHA-256 194ecc6059e52ac9…

MALICIOUS

PDF

33.4 KB Created: 2020-04-11 07:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 10e29457fff60f1afc0f2d920702952f SHA-1: 06710bf70eb1fdb25374b7bc203f132f42b5e1cb SHA-256: 194ecc6059e52ac9d69d517f2fd4bae7697cfa0b44b5d6447eb40a0e04a9d384
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, forming a link farm designed to redirect users to other PDF files. The presence of the URL http://sta-66-99-58-206.ladse.org/uploads/1/3/0/6/130640053/130640053.html#puddle+of+mudd+download suggests a lure for potentially malicious content. While no scripts were explicitly extracted, the PDF structure and the heuristic firings strongly indicate a malicious intent to host and distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://sta-66-99-58-206.ladse.org/uploads/1/3/0/6/130640053/130640053.html#puddle+of+mudd+download
    • http://deviatefish.net/uploads/1/3/0/5/130588529/3427798.pdf
    • http://nareshgambhir.com/uploads/1/3/0/3/130324418/8df7d37b5.pdf
    • http://costassolutions.com/uploads/1/3/1/4/131453527/b374b3.pdf
    • http://kenishacoburn.com/uploads/1/3/0/7/130776757/zevovigi.pdf
    • http://eneduerabe.org/uploads/1/3/0/6/130604672/62bce8197.pdf
    • http://mpbadges.net/uploads/1/3/1/0/131070597/4070128.pdf
    • http://teamelite10u.com/uploads/1/3/0/7/130739951/nafavi.pdf
    • http://thesuccessjourney.org/uploads/1/3/0/5/130550873/14d1a9c54ad9.pdf
    • http://truebluecleaning.net/uploads/1/3/0/6/130622013/ded6c7f8e.pdf
    • http://damselflyonawhim.com/uploads/1/3/0/6/130621530/zibexifiviw.pdf
    • http://savannahcarpenter.com/uploads/1/3/0/2/130270893/3dc943b.pdf
    • http://icuinvestigations.info/uploads/1/3/0/5/130551222/vazak.pdf
    • http://mdpropertyservices.org/uploads/1/3/1/6/131636806/nifitoxebuseweledo.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_off00005d61.bin
624e615faf825aa9bb205a0b431a66a93dc966e60a5354c9b9451beb956b67e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D61 7152 bytes

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