Malicious PDF — malware analysis report

Static analysis result for SHA-256 047f7ec39af530cf…

MALICIOUS

PDF

33.5 KB Created: 2020-06-03 11:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eea5927db7c3bb09280961e7e701368e SHA-1: bef6d17d6962d88dfd35afde3a0c3c6ca6bc4558 SHA-256: 047f7ec39af530cfbfe6c2a4c7e9c53815dc5978f150757827b84e292c0d5a1b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded URLs suggest a link farm or a method to distribute malicious content across multiple domains. While no scripts were directly extracted, the nature of the links and the ML classification indicate a malicious intent, likely to redirect users to harmful sites or for SEO manipulation.

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://genesint.com/uploads/1/3/0/3/130313015/130313015.html#car+buying+guide+pdf
    • http://aspoonfulofsugarbakeshop.com/uploads/1/3/0/2/130289339/wuxovuziradejakam.pdf
    • http://riverhawkguidedfishing.com/uploads/1/3/1/6/131606509/pibigo.pdf
    • http://lalacupcakes.com/uploads/1/3/0/4/130476740/ee385f.pdf
    • http://cleanjust4u.com/uploads/1/3/0/5/130541188/pufigeda.pdf
    • http://genesint.com/uploads/1/3/0/3/130313015/terms.html
    • http://genesint.com/uploads/1/3/0/3/130313015/dmca.html
    • http://genesint.com/uploads/1/3/0/3/130313015/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://nixalomitu.files.wordpress.com/2020/05/sidajifisegeto.pdf
    • https://gorofurel.files.wordpress.com/2020/06/kikarimovi.pdf
    • https://zitipon.files.wordpress.com/2020/05/kofanefazupinidife.pdf
    • https://kusulubir.files.wordpress.com/2020/05/20925396101.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_off000059d4.bin
f73f6d0f291af9211f6298c55479185d1e0512132513bc4c5c6d659f9a301d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D4 9808 bytes

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