Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1740cf7c4299b96…

MALICIOUS

PDF

42.4 KB Created: 2020-06-17 02:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69e877276e492e45a320209d15f17b7d SHA-1: 28e2fb3036d861a591d20bf2762e17cbb57f9e10 SHA-256: c1740cf7c4299b96e9377b9eb121d4cb64a97638a1c7fc0452f83c979bb468d8
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 to other PDF documents hosted on various domains. This pattern is indicative of SEO poisoning or a link farm designed to distribute malicious content or redirect users to phishing sites. No scripts were extracted, and the document body is largely unreadable binary data, but the heuristic firings strongly suggest a malicious intent to redirect users to external resources.

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://4ew.undesirable.us/uploads/1/3/2/3/132302987/132302987.html#emergency+power+for+radio+communications+pdf
    • http://lastsolo.com/uploads/1/3/0/6/130640214/bunolemexis.pdf
    • http://orchardlanguageschool.com/uploads/1/3/0/6/130621095/7471996.pdf
    • http://aliciawillspettit.com/uploads/1/3/1/8/131857890/kiparefikupup.pdf
    • http://superiorusabenefits.com/uploads/1/3/1/4/131438078/8b17cb3f6303a0.pdf
    • http://h773m.com/uploads/1/3/0/3/130323249/gudifujoremit.pdf
    • http://miningautomotive.com/uploads/1/3/0/5/130590594/9048705.pdf
    • http://midnightcoastgroup.co/uploads/1/3/1/3/131383594/xemewu_sozupuw.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_off00006842.bin
5b680bb916219101dd1721d0abe149809476aa6528faa68f5b3e23b925cee4c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6842 5476 bytes
font_01_sfnt_off00007add.bin
bbbccf85ff2425c42c85d38fabe8dc5a289055e333f4295c605a9d62106c2229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADD 10204 bytes

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