Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c50b8191130e0b…

MALICIOUS

PDF

58.3 KB Created: 2020-05-23 13:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c1e80999211e7776af36f48b26f4510 SHA-1: 815fb8212115e9c375b6cecd7fcfde403aea4137 SHA-256: d7c50b8191130e0bac892f2ef6cce4ea623a1bf59362e10eae5a63a3a5880512
62 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a link farm, indicating it hosts a large number of external links. The document body and extracted URLs reveal a pattern of linking to numerous PDF files hosted on unrelated domains. This suggests a tactic to manipulate search engine results or to distribute a large volume of content, potentially malicious, across many sites. No scripts were extracted from this sample.

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://toinspiremusic.com/uploads/1/3/0/4/130476168/130476168.html#positive+psychology+harvard
    • http://manchestersoap.com/uploads/1/3/1/4/131406480/junikufewegi.pdf
    • http://vastgoed-turkije-be.com/uploads/1/3/0/3/130379170/5b8f10d5e07.pdf
    • http://59ersband.com/uploads/1/3/1/3/131381605/ganel.pdf
    • http://romanousarchitects.com.au/uploads/1/3/0/9/130969731/sinadedij_porijobulal.pdf
    • http://care4people.com/uploads/1/3/0/5/130550876/7796175.pdf
    • http://mail.giteregrunel.com/uploads/1/3/1/0/131070452/xamemazaxipo.pdf
    • http://cflchoiceforlifeministry.com/uploads/1/3/0/7/130739830/652475.pdf
    • http://onthebellbrand.com/uploads/1/3/1/4/131437981/bugajaduvibudosokivi.pdf
    • http://fenomenoyoga.net/uploads/1/3/0/2/130291433/4929433.pdf
    • http://nswbjj.com.au/uploads/1/3/0/3/130323765/juduzuzugid.pdf
    • http://bahaisunited.org/uploads/1/3/0/5/130588230/vowan-rinizodadumuwi-rofolalepol.pdf
    • http://retailshrinksolutions.com/uploads/1/3/0/7/130775358/ruvefos.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_off0000b876.bin
775e6485e1018b6ff3aa18994e4b6e0bef62f8a39bf907e94bc3b6f250c63400		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB876 11004 bytes

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