Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7031feb6ea6ab08…

MALICIOUS

PDF

70.7 KB Created: 2020-04-14 09:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 666aa21c1d0e45e108c23136ddc30d72 SHA-1: a9f72630a432f47250cfe7c89dd2d4da59dcd9d7 SHA-256: d7031feb6ea6ab08e6bc0e0aaaede38a6c1bdb06443895af7f793c8c87630715
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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning attack. The document body is heavily obfuscated and contains embedded URLs, but the primary malicious activity appears to be the distribution of these external links. 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://uibffworld.org/uploads/1/3/0/6/130604452/130604452.html#cardiac+arrhythmias+pdf
    • http://pegschweitzer.com/uploads/1/3/0/6/130620501/bomaf-vixisovetazade.pdf
    • http://meticules.com/uploads/1/3/1/4/131409009/piramubitamolaw.pdf
    • http://forb-courses.org/uploads/1/3/1/4/131409884/gagemabe-vegowe-digivej.pdf
    • http://oneloveteenproject.com/uploads/1/3/0/7/130776088/vanenu_zuvomawik.pdf
    • http://lovetolearnfl.com/uploads/1/3/0/7/130775396/fd730ffe305.pdf
    • http://leiyamahoneymassageandbodywork.com/uploads/1/3/1/0/131070827/purowomosusila-fukev.pdf
    • http://mathoutreach.com/uploads/1/3/0/2/130272976/pikuwebujazole.pdf
    • http://dadtheatre.com/uploads/1/3/0/6/130621669/7ed98293a11.pdf
    • http://lovetolearnfl
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d127.bin
b095009e1aa7b679086a2dd093949a1e2bfdfa179c83d9e64a20210f199a406d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD127 1544 bytes
font_01_sfnt_off0000d896.bin
4412986b8bfb8ee0bbd0ef71fdcb877e13f149ca3186407ea2eed36d3919fd92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 8672 bytes
font_02_sfnt_off0000f99e.bin
6fd14b75b40592aa63214dc3858e40b996a0bcf5155abc0d72d014faea57e82d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 16084 bytes

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