Malicious PDF — malware analysis report

Static analysis result for SHA-256 648eb878c745bd57…

MALICIOUS

PDF

37.0 KB Created: 2020-06-02 18:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9374b94c118b5c3cef15613347a62c53 SHA-1: dcee2751c16a2bc0fc4f240fd2b1e8d72afe43d9 SHA-256: 648eb878c745bd57e73b5c501bf9a2279b97dccdd9d3be540c7ceefb80d9a13c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO spam campaign, likely intended to drive traffic or distribute further malicious content. The ML classifier strongly supports the malicious verdict.

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://chicromancetravel.voyagerwebsites.com/uploads/1/3/0/5/130551198/130551198.html#avatar+trainer+hacked+download
    • http://udhihoney.com/uploads/1/3/0/6/130639538/lunusaki_fewutavaken.pdf
    • http://beaux-and-arrow.com/uploads/1/3/1/4/131438428/rosax-nipelarev.pdf
    • http://viticulteur-responsable.com/uploads/1/3/0/5/130545475/wufuvem-legid-lowonotu-rogogisezon.pdf
    • http://ps-saviese.ch/uploads/1/3/0/8/130813999/0a6cc3e5286a9.pdf
    • http://almaboricphoto.com/uploads/1/3/1/4/131406977/devup.pdf
    • http://chicromancetravel.voyagerwebsites.com/uploads/1/3/0/5/130551198/terms.html
    • http://chicromancetravel.voyagerwebsites.com/uploads/1/3/0/5/130551198/dmca.html
    • http://chicromancetravel.voyagerwebsites.com/uploads/1/3/0/5/130551198/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://todufedok.files.wordpress.com/2020/05/fojoxo.pdf
    • https://sulajuxije.files.wordpress.com/2020/05/lewubuputadoburavo.pdf
    • https://paxenobotib.files.wordpress.com/2020/05/80080016559.pdf
    • https://kurupava.files.wordpress.com/2020/05/wonabasenunemeno.pdf
    • https://xopofaxut.files.wordpress.com/2020/05/zeniruwupazepiginuda.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_off00006208.bin
6313053383aa39cecccb09e3eb55e7ec28e8b256f856b0799acac78c395615a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6208 11528 bytes

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