Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ec4065d84ff93f…

MALICIOUS

PDF

37.2 KB Created: 2020-04-16 08:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 03bc87041391046d3ac60a48bd39da63 SHA-1: b8d0c5082482537eba1dc5f9134ff30f5e51a130 SHA-256: 67ec4065d84ff93f140648a4e907392f0329887ef6bc3b28ae05919ddcc28804
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to PDF files with numeric slugs, indicating a link farm or SEO spamming technique. The ML classifier strongly flagged this PDF as malicious. The embedded URL and the numerous external links suggest an attempt to redirect the user to malicious content or phishing 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://beingself-centered.com/uploads/1/3/0/7/130775245/130775245.html#basic+scholarship+essay+format
    • http://airforpaws.org/uploads/1/3/1/3/131381985/9395339.pdf
    • http://physioforme.net/uploads/1/3/0/6/130603803/ed37c0.pdf
    • http://presentezimmer.com/uploads/1/3/1/0/131071082/d2b055fb6.pdf
    • http://petalesdefleurs.com/uploads/1/3/0/5/130550714/8068573.pdf
    • http://believeyouarethatgood.com/uploads/1/3/0/6/130621846/nesoge.pdf
    • http://rtpliving.com/uploads/1/3/0/6/130620391/vegolomor-nekinobotuge.pdf
    • http://hecuba.co/uploads/1/3/0/6/130620295/widokijav.pdf
    • http://clarksontherapy.ca/uploads/1/3/0/4/130435745/rivaxekulosezerak.pdf
    • http://businesswritngmasters.com/uploads/1/3/1/4/131454440/tezobidala.pdf
    • http://luxurylashempire.com/uploads/1/3/0/3/130323674/foxigajubawo.pdf
    • http://ohmtaxi.com/uploads/1/3/0/6/130639027/3f81035e2d94f5a.pdf
    • http://cween.org/uploads/1/3/0/4/130476368/jimefipe-liwafetolafel.pdf
    • http://babyg-lash.com/uploads/1/3/0/8/130874429/d3646b.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_off00006aa8.bin
e0e72ab11696991007ccfff8737662103c0b680567a04c48cb02840df99288a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA8 7672 bytes

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