Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dabd427b93d86e3…

MALICIOUS

PDF

58.0 KB Created: 2020-05-17 12:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc47d58059323668d1a6853feb27f313 SHA-1: 405a9388ba9f38e74a309ace01a0d4d3f30710af SHA-256: 2dabd427b93d86e3568fb2da4b537c2b69a20a608ca19174a4da5ffd8de1f437
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. The document body, though heavily obfuscated, contains references to these URLs, suggesting a lure to external content. The primary attack pattern appears to be a link farm designed to direct users to potentially malicious content hosted across multiple domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://alexdarin.com/uploads/1/3/1/4/131438459/131438459.html#cells+alive+worksheet+key
    • http://chrisschorpp.de/uploads/1/3/1/3/131383297/8485880.pdf
    • http://deidrescott.com/uploads/1/3/1/3/131381225/a9fcf4b1e2646.pdf
    • http://ladybugbakingco.com/uploads/1/3/1/4/131414240/1416760.pdf
    • http://dennisandlorenzo4ugbc.com/uploads/1/3/1/3/131384336/9744936.pdf
    • http://fatdogsoaps.com/uploads/1/3/0/8/130814868/4582660.pdf
    • http://matt4claremont.com/uploads/1/3/0/6/130620889/ceb4f0cca657fb.pdf
    • http://awinspection.net/uploads/1/3/0/5/130552055/fopebevajus_ruguwoxekaxope_pesorasobu.pdf
    • http://dawnhillsenate.org/uploads/1/3/1/3/131381804/sotolawon.pdf
    • http://lifeinyourkitchen.com/uploads/1/3/1/4/131453329/solejosi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a131.bin
d271630c86778b0e0026c8262a0b3c8c989872f0079a332e87b6b187d4c68c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA131 11208 bytes
font_01_sfnt_off0000c796.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC796 16204 bytes

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