Malicious PDF — malware analysis report

Static analysis result for SHA-256 720768808032a83f…

MALICIOUS

PDF

29.4 KB Created: 2020-05-04 14:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d5fc950bf276c7fa54bda2bd5644cb87 SHA-1: f85d1d05552f7421809095b8d2c4da80fc3f98fe SHA-256: 720768808032a83fdc728908c5b9389f172f69cab3c9548de679b7d91e7cdbc0
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a link farm. The ML classifier strongly indicated maliciousness, and the presence of numerous URLs suggests an attempt to direct users to potentially harmful content or for SEO manipulation. No scripts were extracted, but the sheer volume of links points to a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://tartelaine.com/uploads/1/3/0/6/130639155/130639155.html#south+movie+2018+new++mkv
    • http://15500avalon.com/uploads/1/3/0/3/130323755/dazirij.pdf
    • http://odvesports.com/uploads/1/3/0/8/130874641/7143298.pdf
    • http://reemstechnology.com/uploads/1/3/0/7/130739480/xigugur.pdf
    • http://yourdiamondbuyer.com/uploads/1/3/0/2/130271078/7812d1e7c904196.pdf
    • http://fadeintohistory.com/uploads/1/3/0/5/130539706/3ac51d4dff401.pdf
    • http://premierenvirovision.com/uploads/1/3/0/9/130969926/nivig_tiwewo_bivaxixa.pdf
    • http://cedarviewbaptist.org/uploads/1/3/1/0/131070527/483260.pdf
    • http://anndouglassphotography.com/uploads/1/3/1/6/131606347/35f62596eca7e.pdf
    • http://uniqueeventservices.shop/uploads/1/3/1/8/131856754/2fafdb917a1b38.pdf
    • http://joannajensen.shop/uploads/1/3/0/6/130639591/236910cfede9.pdf
    • http://slowlifedoctor.com/uploads/1/3/1/4/131438453/pupuxi.pdf
    • http://thewallpoemsofcharlotte.com/uploads/1/3/0/6/130604872/743554e6b1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off00004817.bin
8cd30c42d1992d55ff6054ecd78ed4730e77f48b2ce60c44dda43729eec318f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4817 10464 bytes

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