Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c62a0ac94dee9c…

MALICIOUS

PDF

29.4 KB Created: 2020-05-13 19:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6990a46ce7f60f6b5f2d581e397542cd SHA-1: f2ae57ae24a12efb3f3b2e036bcf45c1f7432c22 SHA-256: 83c62a0ac94dee9c79b85baee4060211df709f7e415c570e78dc41d25f091afb
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous external links to domains that appear to be part of a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains text related to 'question papers and answers' and includes URLs that are likely part of this scheme. The primary function appears to be directing users to a network of SEO-optimized PDF files hosted on various domains, potentially for malicious redirection or content delivery.

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://globaly.services/uploads/1/3/1/3/131398380/131398380.html#engineering+science+n3+question+papers+and+answers
    • http://rnimotorsports.com/uploads/1/3/0/7/130776887/pekomawujimupofulu.pdf
    • http://meganerey.com/uploads/1/3/0/7/130740146/vufexoneragat_xixuwu_kamut.pdf
    • http://carriescustomcrafting.com/uploads/1/3/0/2/130272577/weduxudemigagopo.pdf
    • http://218a4293p18rb.com/uploads/1/3/0/7/130739062/48f6e3a37a.pdf
    • http://thymomahope.com/uploads/1/3/0/4/130435574/litomujate.pdf
    • http://technik-aus-einer-hand.de/uploads/1/3/1/4/131453015/2111356.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_off00004c50.bin
9495759d6afc194cbda65f03d68a59a483ec3d2458dbd22e2995e82fcbdcddcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C50 8788 bytes

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