Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc3834d6866442d…

MALICIOUS

PDF

42.9 KB Created: 2020-03-26 05:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 85ff20f73b9a797b5ae7bb94a565380e SHA-1: 6bed3b853faaf1c1c85ea5836973f999dab522b4 SHA-256: 3cc3834d6866442dda8054627ee938d51bd2e0999c83cf4953a9c9ebc8b5006d
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, many pointing to other PDF files hosted on various domains. This is indicative of a link farm or SEO spam campaign, designed to manipulate search engine rankings or distribute malicious content. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link distribution.

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://kmipropertieslimited.com/uploads/1/3/1/0/131070581/131070581.html#contabilizacion+de+activos+intangibles+bajo+niif
    • http://life-in-full-empowerment.net/uploads/1/3/0/2/130291493/3265026.pdf
    • http://kelstroconstruction.com/uploads/1/3/0/9/130968962/4840821.pdf
    • http://www.evilsupervillain.com/uploads/1/3/0/4/130435821/d5baf7e957.pdf
    • http://onlytopsaler.site/uploads/1/3/0/7/130738657/8f840.pdf
    • http://petsboulder.com/uploads/1/3/0/4/130483480/texop.pdf
    • http://nangrayphotography.com/uploads/1/3/0/8/130814421/6faa1.pdf
    • http://www.greenearthuniversity.org/uploads/1/3/0/6/130621525/lavupunenixo_patolexu_pejur.pdf
    • http://cbplastics.com/uploads/1/3/0/8/130874111/2701328.pdf
    • http://mydtronic.com/uploads/1/3/0/2/130289406/bd088c3.pdf
    • http://educationwithhope.com/uploads/1/3/0/5/130542935/8075987.pdf
    • http://canvasdemitierra.com/uploads/1/3/0/6/130604026/a86cd972.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_off00006409.bin
c985463d91962162de1cfea65d73b675efb5c425f5488fadf04619fa0d8dc542		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6409 9596 bytes
font_01_sfnt_off000086b2.bin
b4eaba1313c2ae02e0840532e8df49817f4492e706e7fc7006fa435ca033da2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86B2 16208 bytes

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