Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1601dcc298e7da…

MALICIOUS

PDF

53.9 KB Created: 2020-04-04 12:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6de775d039c9f64be99ccc605210c916 SHA-1: 9a066d0572f28ca8ce9b7ff6cfbe15598e61f5d4 SHA-256: 3d1601dcc298e7dae93511922c098c6b67a0236c50a8c64129a3b19248e88381
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 similarly structured URLs on different domains. This suggests a link farm or SEO poisoning tactic designed to drive traffic to potentially malicious content. The document body is heavily obfuscated and contains embedded URLs that are part of this link farm. 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://thecandicerose.com/uploads/1/3/0/5/130551656/130551656.html#concepto+de+orientaci%C3%B3n+vocacional+pdf
    • http://boulderfamdinner.com/uploads/1/3/1/4/131406931/digixudokax-juvonigubaxa-migevapubugupat.pdf
    • http://wiseway.ee/uploads/1/3/0/5/130539107/nigafavaruv.pdf
    • http://doghousebnb.com/uploads/1/3/0/4/130483647/16e6b144.pdf
    • http://maritimeinsurancebroker.net/uploads/1/3/0/5/130543154/merusenowowo.pdf
    • http://vartspace.org/uploads/1/3/0/6/130639884/vomenej-paxoxodexam-neroviraxumalo-joriwid.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_off000095c9.bin
5a20a5aa13b9e425d973e7d301b182c98cdef1e2e64cb5a5ee9a0a2def38f203		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C9 7496 bytes
font_01_sfnt_off0000b2da.bin
313ae97aba67c0290f1f3f711cce73b58f529e1044d09d56103cb5e1641d71c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DA 16232 bytes

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