Malicious PDF — malware analysis report

Static analysis result for SHA-256 89428e9ca9af850e…

MALICIOUS

PDF

35.7 KB Created: 2020-06-10 13:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d60e95745b7e4121c65e4eb2b0e5753 SHA-1: 279d2409c73df80fe21a2eba6f6b95f147df5097 SHA-256: 89428e9ca9af850ec6c66f2e2808a84fed49b741c5cef0f017e18d1e580f9acf
62 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 document body, though heavily garbled, contains several of these URLs, suggesting a link farm or SEO poisoning attempt. The primary purpose appears to be directing users to a multitude of external PDF files hosted across various domains, likely to distribute malicious content or engage in phishing.

Heuristics 3

  • 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
  • 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://mta-sts.cityofhopechurch.org/uploads/1/3/0/4/130488530/130488530.html#diff%25C3%25A9rence+test+param%25C3%25A9trique+et+non+param%25C3%25A9trique
    • http://secure.finemarkbank.com/uploads/1/3/1/4/131453056/92663.pdf
    • http://insuranceflatform.com/uploads/1/3/1/4/131454420/kerekov_bimaganeseta.pdf
    • http://fasoemarket.com/uploads/1/3/0/8/130873825/7013010.pdf
    • http://matankorin.com/uploads/1/3/0/2/130270974/3684159.pdf
    • https://basirobogegi.files.wordpress.com/2020/06/36567370197.pdf
    • https://lutesonoluwi.files.wordpress.com/2020/06/xikorobebipoxalove.pdf
    • https://kogovabazoro.files.wordpress.com/2020/06/lepuzajigejo.pdf
    • https://sajolesogiw.files.wordpress.com/2020/06/gipotivigixowapa.pdf
    • https://linapejurax.files.wordpress.com/2020/06/63137565922.pdf
    • https://mudirizeki.files.wordpress.com/2020/06/jotilugurudibipuboluge.pdf
    • https://gomepimus.files.wordpress.com/2020/06/72691760290.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_off00005a4c.bin
c2929ebf3c3d5d4cb6acffdd6e5222ce199256c55c21124270f3e28b7035f8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4C 11788 bytes

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