Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f5bb632515ace4…

MALICIOUS

PDF

33.7 KB Created: 2020-06-08 01:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 465fcb823bde7d46b45e64e71bf25dec SHA-1: 1397b23dedc90e2adbe14837d3e4bfac214fbe13 SHA-256: 58f5bb632515ace4dbc3b5697da8a5687661d9145d76e62179fc83d0faf6e100
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files on newly registered domains. The document body text, though partially garbled, includes phrases like 'Arapça türkçe sözlük kitap' which, combined with the link farm heuristic, suggests a tactic to manipulate search engine results or lure users to malicious content. The primary intent appears to be directing users to a network of linked PDF documents hosted on potentially compromised or malicious infrastructure.

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://clevelanddss.com/uploads/1/3/1/1/131164211/131164211.html#arap%25C3%25A7a+t%25C3%25BCrk%25C3%25A7e+s%25C3%25B6zl%25C3%25BCk+kitap
    • http://devshard12312313.com/uploads/1/3/0/7/130739256/2f2e5bd5.pdf
    • http://tujaalradio.com/uploads/1/3/1/3/131383453/9689795.pdf
    • http://mail.chezthuy.com/uploads/1/3/0/4/130436050/5495357.pdf
    • http://webmail.hairfarmsalon.com/uploads/1/3/1/3/131398294/bepixikudiserota.pdf
    • https://budedugis.files.wordpress.com/2020/06/xojutomejubekajedilit.pdf
    • https://kogubala.files.wordpress.com/2020/06/66956020301.pdf
    • https://nafevulaxa.files.wordpress.com/2020/06/zelikutekej.pdf
    • https://sirozujulad.files.wordpress.com/2020/06/91929668616.pdf
    • https://mebanome.files.wordpress.com/2020/06/56967400.pdf
    • https://lubaxop.files.wordpress.com/2020/06/kuradivojaresalujuzulako.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_off000055c8.bin
20de82c6acb5f6a39e9c6c19bfa75c009ddfdce340d06570f3f0c261a78c0ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C8 11912 bytes

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