Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa5e17762697bb2…

MALICIOUS

PDF

43.1 KB Created: 2020-04-13 11:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f5c43166b24d1f68a3fff9a8ee6d255f SHA-1: 7eea9d1528a5dcab4c213304056cd491adb1e45b SHA-256: 4fa5e17762697bb2f63f501dc3840c83ee392f97eac1007ac4339c398b32ad92
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous external links, with a significant heuristic firing indicating a PDF link farm. The document body, though partially corrupted, includes a URL that appears to be part of this link farm. The primary intent seems to be directing users to external websites, likely for SEO manipulation or to serve further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://firedamageslc.com/uploads/1/3/1/4/131455825/131455825.html#how+to+say+thanks+in+advance+in+french
    • http://thekcgroup.net/uploads/1/3/0/4/130489909/e1cb25.pdf
    • http://vibecandlez.com/uploads/1/3/1/4/131453943/texesowiruli.pdf
    • http://hippopcycle.com/uploads/1/3/0/6/130621196/dadiwujutabemavuk.pdf
    • http://daumcollectors.com/uploads/1/3/0/5/130550827/1cbbb20.pdf
    • http://lowcountrycommunityservices.com/uploads/1/3/0/4/130483519/1366231.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_off00007dfd.bin
4344a3ab32710b9e314d29da2ab81a660136a2b7694666667a85c07577f6e9df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFD 9000 bytes

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