Malicious PDF — malware analysis report

Static analysis result for SHA-256 28245d66ada0eec8…

MALICIOUS

PDF

37.4 KB Created: 2020-04-11 08:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dc30d322775dcb7d335185398ac298a0 SHA-1: 4eeb8922c9913838dabdb6e5bb12c59f030c67f1 SHA-256: 28245d66ada0eec8414bd9880a90b6a436e2136387300916be7f60c8b0cd2a7d
94 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to domains that appear to be part of a link farm designed to host malicious content. The ML classifier strongly indicated maliciousness. The document body, though truncated, includes a reference to 'Justin timberlake sunshine in my pocket' alongside metadata from wkhtmltopdf, suggesting a deceptive lure to a malicious URL. The primary attack pattern involves directing users to external sites that likely host further malicious payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://74-123-73-78.mgwnet.com/uploads/1/3/1/3/131379231/131379231.html#justin+timberlake+sunshine+in+my+pocket
    • http://smyrnatreeservice.net/uploads/1/3/0/4/130488153/lojurinufeje-segaguxovelu-sikes.pdf
    • http://lusciousbeautyhub.com/uploads/1/3/1/4/131437859/nanafafojix-segug-lekinemazadixun.pdf
    • http://iammonavenus.com/uploads/1/3/0/5/130540286/9211137.pdf
    • http://nelnahbessiejohn.com/uploads/1/3/1/1/131163898/wofifo.pdf
    • http://ludwigfamilytoghana.com/uploads/1/3/0/5/130589098/addcd620bb5.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_off00006b4f.bin
e14b0523e498974fe4292ea7af081e1bdca4e811e0507c669517d7ab42d6d023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4F 7868 bytes

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