Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b0dad2f53ed950…

MALICIOUS

PDF

33.1 KB Created: 2020-06-16 15:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fbaf9c7d8c86fde34c5e6722a03bb35 SHA-1: f34351b0faaa2ab44061772184e62f9736e67f64 SHA-256: 40b0dad2f53ed95079db8d00fc21775de71e2e1c5c80cd4886757d39f7ea455e
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains references to 'marriage journal pdf' and includes numerous URLs pointing to other PDF files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests that the document may be intended to trick users into believing they need a password to access content, potentially to hide the true malicious nature of the linked files. The primary attack pattern involves directing users to a network of external PDF links.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cptsdlight.net/uploads/1/3/2/6/132682013/132682013.html#marriage+journal+pdf
    • http://bsgas.org/uploads/1/3/1/4/131407711/0b86e2db870df56.pdf
    • http://flourishingnews.com/uploads/1/3/1/6/131606121/4681026.pdf
    • http://regress.us/uploads/1/3/1/4/131452732/af0e1b4336b18.pdf
    • http://peopletrak.airspray.com/uploads/1/3/0/7/130776405/suzaf.pdf
    • http://41a.undesirable.us/uploads/1/3/0/5/130547624/8293341.pdf
    • http://deutsh.travelmittelamerika.com/uploads/1/3/0/6/130639869/9663244.pdf
    • http://billiesplace.co.nz/uploads/1/3/0/2/130272928/fasowewuzamuru_kutobepazuj_sutajimesol.pdf
    • http://sjpanalytics.com/uploads/1/3/0/4/130488700/netilabunigilu_lotukoven.pdf
    • http://jinwonhanglass.com/uploads/1/3/0/2/130291971/853d96f99.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_off000055c5.bin
3e693a57cdd222d830d5aeb2e44322d9526fcaf054c215d97efdcd5f89592874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C5 10664 bytes

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