Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1759136f7d44cb4…

MALICIOUS

PDF

32.9 KB Created: 2020-05-13 07:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d6e2cdcde8c39bba96f5c36ed7d98470 SHA-1: d943d33389ae17c30ead743cc33729ecdacdb16a SHA-256: b1759136f7d44cb439fa9e1a70953c59aab6ce2c31b603cfbac2d0db93cfdcc0
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or distribution mechanism. The ML_NYX_PDF_MALICIOUS heuristic also flagged the file with high confidence. No scripts were extracted from this sample, but the presence of numerous external URLs indicates a potential for distributing further malicious content or engaging in SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://magicaljourneypsychics.com/uploads/1/3/0/7/130775355/130775355.html#genomelink+sample+report
    • http://charityangelkerr.com/uploads/1/3/1/4/131437377/jexibusedeg.pdf
    • http://ashirhealth.com/uploads/1/3/0/6/130620612/ketalowetaj.pdf
    • http://livingstonfamfarms.com/uploads/1/3/0/5/130543494/vitatesareduw.pdf
    • http://passionoasis.net/uploads/1/3/0/6/130621352/dedifubulemeludoger.pdf
    • http://terracepipesanddrums.com/uploads/1/3/0/6/130603945/jimalesus_zobalin_modalegup.pdf
    • http://explicitmusicdvb.com/uploads/1/3/0/6/130621501/fuvipasene-jijejezinebu.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_off000054eb.bin
923c1990c80274947754d971f41f7c89196aa5586259e0c386df189c7aa369fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54EB 10644 bytes

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