Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf97260f77adea3…

MALICIOUS

PDF

36.1 KB Created: 2020-04-05 06:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: caa7abb6eda875cb34228322d9cf1c6c SHA-1: 60708ec6a16924f3743ba4245afeb375a54f6621 SHA-256: abf97260f77adea33d229f1341fd58c722050e9b7c13e046339519b92770dcb8
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, a technique commonly used for SEO link farming or to redirect users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this pattern. The ML classifier also strongly indicated maliciousness. The document body text is largely unreadable due to encoding issues, but the presence of numerous external URLs is the primary indicator of malicious intent.

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://cityonloc.com/uploads/1/3/0/5/130551423/130551423.html#partes+en+el+contrato+de+arrendamiento
    • http://goldgtechnology.com/uploads/1/3/0/6/130604724/af7fb9c00f5.pdf
    • http://mediapast.net/uploads/1/3/1/1/131163851/443d61.pdf
    • http://cleohogandisabilitygroup.com/uploads/1/3/0/8/130814329/a8ef74e370a8.pdf
    • http://mypainbegonevillage.com/uploads/1/3/0/5/130550980/bogolefogugebivupux.pdf
    • http://affirmationmugs.com/uploads/1/3/0/3/130379175/pelebakevunul.pdf
    • http://communityspanish.com/uploads/1/3/0/6/130621451/8742264.pdf
    • http://lisakennedycollections.com/uploads/1/3/0/9/130969072/taleregiguma.pdf
    • http://smartwaste.site/uploads/1/3/1/1/131163620/2c9c3e4b6.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_off0000627f.bin
aefc8c24e4721b703e36d096b6090e1910f65811e672a00a3251871e8f8e4f73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627F 8688 bytes

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