Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fbbda2efc926112…

MALICIOUS

PDF

43.3 KB Created: 2020-04-12 20:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2ff5a34897c4b4ce0b809b5ab59de4cd SHA-1: ed208aeb318ad44759d9ea4a99b8f53e13e1f5cd SHA-256: 7fbbda2efc9261129f12a1ada99313c8a4f061576a466120f6097b29acf81802
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to domains that appear to be part of a link farm. The primary external URI, http://kingstechdeals.com/uploads/1/3/1/6/131606353/131606353.html#wine+tourism+statistics+europe, suggests a lure related to statistics. The ML classifier strongly indicates maliciousness. The presence of numerous SEO-linked PDFs suggests an attempt to distribute malicious content or redirect users to phishing sites.

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://kingstechdeals.com/uploads/1/3/1/6/131606353/131606353.html#wine+tourism+statistics+europe
    • http://jonathonwithaon.com/uploads/1/3/0/9/130969204/perot_pofesufasa_kipib_kimoxegixesozow.pdf
    • http://myairmini.com/uploads/1/3/0/6/130603988/80a02.pdf
    • http://firstgradealexandriaquinlan.com/uploads/1/3/1/1/131163864/dapof.pdf
    • http://kamachiro.com/uploads/1/3/0/4/130483565/buruxobiti-turexuxixe-gatizeveje.pdf
    • http://micasarenovations.com/uploads/1/3/0/7/130776326/ravixateja.pdf
    • http://onelegalaccounting.org/uploads/1/3/0/5/130589000/7924883.pdf
    • http://polarsleep.com/uploads/1/3/0/3/130313021/58d3640824b8c9f.pdf
    • http://ajoboerenhulp.eu/uploads/1/3/0/7/130775199/18a8b8e7f836.pdf
    • http://modvintiqueinteriors.com/uploads/1/3/0/7/130775712/birenopowubewos.pdf
    • http://myairmini.com/uploads/
    • 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_off000080d3.bin
5f597072cf1123151dbe452ac0bb3d352a025c76bae3e41821ba6ff4a5ee9a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D3 8024 bytes

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