Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d51127745d8de24…

MALICIOUS

PDF

33.6 KB Created: 2020-05-31 21:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5045b85945c2cb867ba9bd8275b154f SHA-1: 3fbc025c99c996fc498892ef1dd5c0bd3bfdaf8c SHA-256: 6d51127745d8de2405c924071101937141ab72253f7ab32e593d0e00a6010619
96 Risk Score

Malware Insights

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

The PDF document contains embedded links, including one pointing to 'curtisgifted.com', which is likely a malicious landing page. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://curtisgifted.com/uploads/1/3/1/6/131637037/131637037.html#thunderbird+print+preview+not+working
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vosafeviba.files.wordpress.com/2020/05/97126759835.pdf
    • https://pawojoteloje.files.wordpress.com/2020/05/wevalivusevemewobux.pdf
    • https://wiwabewata.files.wordpress.com/2020/05/97943406912.pdf
    • https://zosagadepug.files.wordpress.com/2020/05/pofefepi.pdf
    • https://fagirixol.files.wordpress.com/2020/05/54061711154.pdf
    • https://lesijasofu.files.wordpress.com/2020/05/mulowugusem.pdf
    • https://rijubunaji.files.wordpress.com/2020/05/zoxevuzisuvotezepogejudo.pdf
    • https://judesugitu.files.wordpress.com/2020/05/nezijotuvesepuse.pdf
    • https://bokaril.files.wordpress.com/2020/05/82445895820.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ee.bin
b696c09943f27abe78b97eec7d58fc7731b02902f92c32750842a0d97e77491c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58EE 10120 bytes

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