Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0483619d37a2a44…

MALICIOUS

PDF

43.7 KB Created: 2020-04-12 04:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a7aa82360ad39f93267cf56b7bfd1f10 SHA-1: ab6899175671eaa8da37f7a40e8b95b8a88e2bd9 SHA-256: e0483619d37a2a44a2ff42d64326c0ef254a0c2c21add12e020828cf597552ae
102 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1598.003 Subvert Control Systems

The PDF contains a large number of external links, many of which point to other PDF files with numeric slugs, indicative of a link farm or SEO abuse. The 'SE_CLICKFIX' heuristic suggests the document may attempt to trick the user into executing commands, possibly to bypass macro restrictions. The primary attack pattern involves directing users to a series of linked PDF documents hosted on various domains.

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://agrudjr.com/uploads/1/3/0/6/130639254/130639254.html#para+que+sirve+el+comando+nslookup
    • http://netthenumbers.com/uploads/1/3/0/7/130775341/jakazoretokusenam.pdf
    • http://livingwaterupc.org/uploads/1/3/0/7/130775540/970378.pdf
    • http://megjhunter.com/uploads/1/3/0/9/130969310/mifet-nagobiz-kusudag-morutak.pdf
    • http://naturesobservatory.com/uploads/1/3/0/2/130288710/8929995.pdf
    • http://birthnaturallyri.com/uploads/1/3/1/1/131164421/lavabuperiwupi-tojixapi-javatadal.pdf
    • http://belairunitingchurch.org/uploads/1/3/1/4/131438888/tifun.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_off00006ac0.bin
3a706d8e1edd567bc4a74eef199c7273001640a73a48b33da2caa794b928d194		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 9240 bytes
font_01_sfnt_off00008c83.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C83 16036 bytes

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