Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71e1d38ee4c690b…

MALICIOUS

PDF

37.0 KB Created: 2020-06-11 15:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c51ecd4bb36ba0a01a2edbf82c349d7 SHA-1: 294967c532bd080ccf70cef795447c0f27598436 SHA-256: c71e1d38ee4c690bbbb5d19cfc106d1b6c975cdfd0bc6037292062283cc53ca0
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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, also contains URLs that are consistent with this pattern. The primary purpose appears to be directing users to external resources, potentially for malicious distribution or to manipulate search engine rankings.

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://1cj.undesirable.us/uploads/1/3/0/3/130313557/130313557.html#worksheets+for+collective+nouns
    • http://anthonybrothersuk.com/uploads/1/3/0/5/130539115/aa7b4c8f59bd516.pdf
    • http://new.maccastech.com.au/uploads/1/3/0/7/130776553/jabetotowukerinejow.pdf
    • http://bluemountainboutique.shop/uploads/1/3/0/5/130590710/verexojig-tiwavoxobapato-pigatedukof.pdf
    • http://yourlocalmuses.com/uploads/1/3/0/2/130289262/koberexorafosezad.pdf
    • http://bimaservices.net/uploads/1/3/0/6/130639914/witogakumot.pdf
    • https://ribijuwet742308788.files.wordpress.com/2020/06/89642882546.pdf
    • https://vudilofifo.files.wordpress.com/2020/06/41064432498.pdf
    • https://viledegup.files.wordpress.com/2020/06/zotusidexeker.pdf
    • https://lasewodaba.files.wordpress.com/2020/06/sonosubepirulameb.pdf
    • https://keligorages.files.wordpress.com/2020/06/jezesefenoxamexawa.pdf
    • https://lelawef.files.wordpress.com/2020/06/23432826059.pdf
    • https://razekezal.files.wordpress.com/2020/06/77417042463.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cfb.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFB 1800 bytes
font_01_sfnt_off00006587.bin
9beffa03944227e6e533f1da9c8c1cf4f6b66c229ef4cf4368f1b7faa1c56036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6587 10056 bytes

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