Malicious PDF — malware analysis report

Static analysis result for SHA-256 117a9f48dd11f5e1…

MALICIOUS

PDF

53.0 KB Created: 2020-04-10 07:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0d8806eb7cc9b48f764461590cf11c1d SHA-1: cd99b3e162982848657778bbe49ecca8e07cc4f6 SHA-256: 117a9f48dd11f5e1f4dfb870242f2640614d07597324c04e2082d04ae9dc12e4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by an ML classifier as malicious and contains a large number of external links, many of which point to PDF files on unrelated domains. This suggests a link farm or a method to distribute further malicious content. The primary intent appears to be directing users to these external resources, likely for SEO poisoning or to host malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://marikacleaningservice.com/uploads/1/3/0/8/130813965/130813965.html#%C2%BFen+qu%C3%A9+circunstancias+aparece+la+filosof%C3%ADa+en+la+vida+humana
    • http://ethanjulian.com/uploads/1/3/1/3/131384797/9a6594230f0d928.pdf
    • http://northwoodsvapor.com/uploads/1/3/0/2/130289166/6687087.pdf
    • http://oppiadesign.com/uploads/1/3/0/6/130620763/1d868967a9.pdf
    • http://justin-cindy.com/uploads/1/3/0/6/130640046/507918.pdf
    • http://jjlimaconsultor.com/uploads/1/3/1/4/131406444/duvewekiwaza.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_off0000a3b7.bin
f93d5ef7eba98b34d0b8c4fa8842158ca821dfb504a56bb60f7908417f1829d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B7 8912 bytes

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