Malicious PDF — malware analysis report

Static analysis result for SHA-256 673463d7596f2b6f…

MALICIOUS

PDF

33.0 KB Created: 2020-05-13 13:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c33294c165f992e45391965e807ec84c SHA-1: 9ab2e788f788071634ece1198cb9dd63f70c04f8 SHA-256: 673463d7596f2b6f1117590295d689c4d2244fa1c50f640ae029c311fc8486bb
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs suggest a distribution or redirection mechanism, potentially leading to further malicious content or phishing attempts.

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://jvcleaning.net/uploads/1/3/1/6/131637484/131637484.html#applications+of+trigonometry+pdf
    • http://accyp.com/uploads/1/3/0/6/130639616/riviwigemul.pdf
    • http://patelglobal.com/uploads/1/3/0/3/130313809/2941546.pdf
    • http://eatlovetrainplay.com/uploads/1/3/0/5/130551311/9583136.pdf
    • http://luminary-sa.com/uploads/1/3/1/4/131453855/biwomojamu.pdf
    • http://whiteboyconstruction.com/uploads/1/3/0/5/130539888/69d7a50877921d.pdf
    • http://asweetsart.com/uploads/1/3/0/6/130620207/busite_xamarisenokof_wuxidekegusimes.pdf
    • http://walkingingrace.blog/uploads/1/3/0/3/130323430/fixofufapixaloj-mafibol.pdf
    • http://anovabh.com/uploads/1/3/0/5/130590391/5953310.pdf
    • http://agwrenewableenergycompany.com/uploads/1/3/0/6/130621210/390d9302.pdf
    • http://prep-salon.com/uploads/1/3/0/4/130483900/58b12f3.pdf
    • http://shoptheluxurybee.com/uploads/1/3/0/9/130969237/0a09dff.pdf
    • http://melanieirons.com/uploads/1/3/0/4/130488273/nizofapimixud_fomeruva.pdf
    • http://americanmemorialpark.org/uploads/1/3/0/7/130775685/gumibef_votafojosa.pdf
    • http://timothyrosenkoetter.com/uploads/1/3/1/4/131453892/simusebaxowowukivu.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/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_off00005614.bin
94350fd76d4c02bff21f9dc25abd1d858ede82e84ce2c1176c966d99c926bb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5614 10240 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.