Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93760488ab06f25…

MALICIOUS

PDF

39.9 KB Created: 2020-05-22 02:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a431f4f9240502edadacf5a402e8a7fe SHA-1: aeb819c04428f3f61389e2d31cb53574ebe2336e SHA-256: b93760488ab06f250424aaaf8e038bcf3d5b7e930124171e39ccbaf71cf78d3f
92 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body mentions 'Spotify free ios', suggesting a lure to trick users into visiting these malicious links. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

Heuristics 3

  • 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
  • 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://baseball.peakathleticsystems.com/uploads/1/3/1/6/131606508/131606508.html#spotify+free+ios
    • http://usvisahelper.com/uploads/1/3/0/5/130550684/rupurof.pdf
    • http://nvlpr.com/uploads/1/3/0/2/130272470/2345448.pdf
    • http://premierife.com/uploads/1/3/0/7/130775475/4595746.pdf
    • http://lcareviews.com/uploads/1/3/0/6/130605175/3294564.pdf
    • http://accessaccountancy.net/uploads/1/3/0/4/130483862/vofejotaban-nonif-kaloxodad.pdf
    • http://slayerwasp.com/uploads/1/3/0/2/130272080/pobesonasasan.pdf
    • http://ftgbl.com/uploads/1/3/0/4/130490106/xilorolo-fanuwekewuli-nipumaxi-mugimekowalunof.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_off0000701d.bin
08284e5fb094d440c747d842eea5846fd4c07f4459d4c6252435cd52e44cf7a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701D 10884 bytes

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