Malicious PDF — malware analysis report

Static analysis result for SHA-256 4474c2edf05049b3…

MALICIOUS

PDF

34.2 KB Created: 2020-04-13 16:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 234cda405aa9fac193971daf04ad4853 SHA-1: 5eb4a3eb0895923f964ce7439f50433067050210 SHA-256: 4474c2edf05049b33aecd5a1a79cbab69e5ac47a3390901e4a9b886c99ff1ca0
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent. The document body, though partially corrupted, contains references to these external URLs, suggesting a lure to potentially malicious content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://snowremovalfallriver.com/uploads/1/3/0/6/130620185/130620185.html#lewis+dot+diagram+of+sf4
    • http://thekatexclusive.com/uploads/1/3/1/4/131437733/jidezifanit.pdf
    • http://thewallcoveringboutique.com/uploads/1/3/1/4/131406895/c2b52b353.pdf
    • http://californiapolicysolutions.net/uploads/1/3/1/3/131383860/69e7b72.pdf
    • http://chirocko.com/uploads/1/3/0/5/130540097/burovixusa.pdf
    • http://greenmountainmangalitsa.net/uploads/1/3/0/6/130604874/kazina.pdf
    • http://tagliresort.com/uploads/1/3/0/8/130874431/91fa8.pdf
    • http://rebelu.godfrey-lee.org/uploads/1/3/0/4/130483200/946170bf35.pdf
    • http://legacy-restoration.com/uploads/1/3/0/7/130738700/3654117.pdf
    • http://asperaarchitects.com/uploads/1/3/0/3/130379293/dapidakonuwi.pdf
    • http://badbanana.org/uploads/1/3/0/6/130620921/9318313.pdf
    • http://campbellscott.org/uploads/1/3/0/6/130620674/nifepi.pdf
    • http://amielynnedesigns.com/uploads/1/3/0/5/130588627/2779469.pdf
    • http://hanvengrove.com/uploads/1/3/0/4/130483733/9750455.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_off00005ed3.bin
77bcbfe6a522173d7f40a178ecf719dd8103da682f21e448d6471b6587894d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED3 7648 bytes

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