Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a77f13f1015407…

MALICIOUS

PDF

37.8 KB Created: 2020-04-16 05:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 89444e27970daee46702d75189f7de1f SHA-1: c6250137063c45876984f7ab7e90b2c6f1fb84d3 SHA-256: a3a77f13f1015407c2f798d9fd3df03a6e677da72a96bef0a61708056039fbc6
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document body, though heavily obfuscated, contains text related to 'agarose gel electrophoresis lab report pdf' and references the wkhtmltopdf tool, suggesting a deceptive lure. The primary heuristic 'PDF_SEO_LINK_FARM' indicates a malicious intent to manipulate search engine results or direct users to potentially harmful content. 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://oldkingpartners.com/uploads/1/3/0/7/130776657/130776657.html#agarose+gel+electrophoresis+lab+report+pdf
    • http://jhowardmath.com/uploads/1/3/0/4/130489054/532cfd5d8a.pdf
    • http://thighgapcomedy.com/uploads/1/3/0/5/130538816/98669a.pdf
    • http://tamsenstanifordacupuncture.com/uploads/1/3/0/5/130550969/4131590.pdf
    • http://cmmrizzi.com/uploads/1/3/1/1/131164294/matitivowato_soligi_lamogiraki_peravegi.pdf
    • http://breckenridgeapopka.com/uploads/1/3/1/1/131163943/sezeruxiwazewor.pdf
    • http://retailsquad.fr/uploads/1/3/1/4/131453894/jizenefezetesobu.pdf
    • http://stilesindustries.com/uploads/1/3/0/5/130546759/rasogoz-pawejut-sakuvur-nenatavopix.pdf
    • http://ojalaportfolio.com/uploads/1/3/1/3/131383319/1511756.pdf
    • http://ironlotusyoga.com/uploads/1/3/0/5/130550891/1d8d02.pdf
    • http://ssiz.nl/uploads/1/3/0/8/130874017/9634706.pdf
    • http://rocheleautechnosoft.com/uploads/1/3/1/3/131379274/351136.pdf
    • http://coleelder.com/uploads/1/3/0/6/130639074/logozapodanuj.pdf
    • http://mytrueoption.com/uploads/1/3/0/4/130490151/dcead8357f4111.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_off000063ab.bin
e5af30e988a6e6dc582512c73fa2f9b55932c0021ab5d7cab890a47b5f919bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AB 10944 bytes

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