Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e17b21402b39cef…

MALICIOUS

PDF

39.8 KB Created: 2020-06-02 02:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25d8e231c648e6a4fb7c04b1270e663a SHA-1: 3848aa8dc719f9e4f9ff98015f3748d2386fadc7 SHA-256: 3e17b21402b39cef4e84cd2c839d021d2cc96009d092ee00de2472ad4e11c35d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body contains text and numerous URLs, suggesting a link farm or redirection scheme designed to lead users to potentially malicious content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://kimssgems.com/uploads/1/3/1/0/131070841/131070841.html#delighting+in+the+trinity
    • http://citins.com/uploads/1/3/1/3/131381782/ruxokewusem.pdf
    • http://thechickencouple.com/uploads/1/3/0/4/130435805/vinonu.pdf
    • http://treenbean.com/uploads/1/3/0/3/130312998/dosadebolefufavan.pdf
    • http://cpanel.grimballcotterill.com/uploads/1/3/0/2/130288887/noxonimetelesikawo.pdf
    • http://dentaljedi.com/uploads/1/3/1/6/131637881/vovona.pdf
    • http://dunninger-bio.com/uploads/1/3/1/8/131856214/6716366.pdf
    • http://1lo.undesirable.us/uploads/1/3/1/6/131636914/568fc5d3dc6.pdf
    • http://402river.com/uploads/1/3/0/6/130620604/88c3c96cadfa84.pdf
    • http://jincaiyulechengzaixiankaihu.br3h.com/uploads/1/3/0/8/130814115/3515472.pdf
    • http://kimssgems.com/uploads/1/3/1/0/131070841/terms.html
    • http://kimssgems.com/uploads/1/3/1/0/131070841/dmca.html
    • http://kimssgems.com/uploads/1/3/1/0/131070841/policy.html
    • https://pogunuji.files.wordpress.com/2020/05/35358029624.pdf
    • https://nafodovobe.files.wordpress.com/2020/06/3877702993.pdf
    • https://nadobibiruz.files.wordpress.com/2020/05/surari.pdf
    • https://bugigos.files.wordpress.com/2020/05/39805627989.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070be.bin
c7921a1e69795d248d27d3740691932dabadc33ce218cefaf7f98e42c065186e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BE 10208 bytes

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