Malicious PDF — malware analysis report

Static analysis result for SHA-256 8593275c2f970997…

MALICIOUS

PDF

34.8 KB Created: 2020-04-14 18:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 312366626f032e4c8972bdb53012aa34 SHA-1: cdfb51c161a8fe9a741dda82746e4990c62c9b3a SHA-256: 8593275c2f970997b6cab79ff65b127b2aad68621123ce110261f72f04e41fa8
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document body mentions 'WWE champions redeem codes for android', suggesting a lure to attract clicks. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous unknown URLs supports a malicious intent, likely for SEO manipulation or to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://pdxmidsummer.org/uploads/1/3/1/4/131408546/131408546.html#wwe+champions+redeem+codes+for+android
    • http://ebenezer-baptistchurch.com/uploads/1/3/1/4/131406480/vijexugep.pdf
    • http://iowachapter7bankruptcy.com/uploads/1/3/0/7/130775138/zefazozolew.pdf
    • http://shannonkmcdermott.com/uploads/1/3/0/9/130969761/ponukapuv-wejoro-zebeminebur.pdf
    • http://flykingzcollection.com/uploads/1/3/0/5/130540021/mufokos.pdf
    • http://sarahforskeena.com/uploads/1/3/0/4/130477541/tevivaj.pdf
    • http://lesa.bz/uploads/1/3/1/4/131408203/bulogofawowili.pdf
    • http://luvurstyle.shop/uploads/1/3/0/8/130814782/ab4a6763ee.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_off00005c91.bin
f6bac0d38f2329986668485b4f8319e1098a540801c11027b2bcbb82dd88019a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C91 9176 bytes

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