Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe2dc6d88dbaee4…

MALICIOUS

PDF

43.0 KB Created: 2020-06-03 23:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca9cbd3d4880e5f8d334e34fb360527f SHA-1: 5e0187a86bc4ba6744b8f204a324866eebe988a7 SHA-256: bbe2dc6d88dbaee4ed27644c5e9247764b29488d614a3fffdff39dd6a30ae6f5
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links to various domains, many of which appear to be part of a link farm designed to mimic legitimate content. The ML classifier strongly indicated maliciousness. The primary attack pattern involves redirecting users through these numerous URLs, likely to a malicious site or to serve further malware. No scripts were extracted, limiting the analysis of direct payload execution.

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://1pu5v.bpmtc.com/uploads/1/3/0/6/130604685/130604685.html#blood+glucose+to+a1c+conversion+table
    • http://spread--love.com/uploads/1/3/0/3/130379228/4caa2aea7.pdf
    • http://pacllc.net/uploads/1/3/0/8/130873906/2536152.pdf
    • http://goodasgoldjewelery.com/uploads/1/3/1/0/131070456/rosekizipazuguvu.pdf
    • http://vfoneconstruction.com/uploads/1/3/1/8/131856469/59042f07d9d3d.pdf
    • http://finediningwithcubs.com/uploads/1/3/0/5/130551464/be35d0.pdf
    • http://hostmaster.britishcentre.it/uploads/1/3/0/4/130483184/9984892.pdf
    • http://pcoman.com/uploads/1/3/1/4/131438002/wiwupawiw-jepetajop-nakepu.pdf
    • http://sofakingawesomekc.com/uploads/1/3/0/7/130739004/ludufekubud.pdf
    • http://dalitleon.com/uploads/1/3/0/5/130590312/1323206.pdf
    • http://1pu5v.bpmtc.com/uploads/1/3/0/6/130604685/terms.html
    • http://1pu5v.bpmtc.com/uploads/1/3/0/6/130604685/dmca.html
    • http://1pu5v.bpmtc.com/uploads/1/3/0/6/130604685/policy.html
    • https://sowekurodaji.files.wordpress.com/2020/06/11721011676.pdf
    • https://tezaliloja.files.wordpress.com/2020/06/pawolude.pdf
    • https://desikamen.files.wordpress.com/2020/06/romafedomanawenoguno.pdf
    • https://kolusivip.files.wordpress.com/2020/06/93059886332.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_off00007ad8.bin
e8e3875ed78a4dbec25872253a68fe23877dcdebab518aaabb298608c72b5724		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD8 10868 bytes

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