Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd936ca90e1e099e…

MALICIOUS

PDF

63.6 KB Created: 2020-03-13 01:38:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 06809df81c75b23d4b426cbfaa7cdb93 SHA-1: ff77fe05db894d046fb35848fc042b964768c52f SHA-256: bd936ca90e1e099e843839976bfb1ea272c8e087f8248959caf2405a8b615e0f
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. The primary attack pattern involves redirecting users to these external sites, which could host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://4pwcrv.bdgct.com/uploads/1/3/0/6/130621601/130621601.html#c PDF link annotation
    • http://lifestylewidget.com/uploads/1/3/0/4/130436007/bolevafipenizopigu.pdfIn PDF document text
    • http://www.cms.elkethoms.com/uploads/1/3/0/4/130476347/wivegawivotuguk.pdfIn PDF document text
    • http://74-123-75-153.mgwnet.com/uploads/1/3/0/6/130639214/d3e509123a.pdfIn PDF document text
    • http://www.coloradoprofessionalnetwork.com/uploads/1/3/0/7/130740572/satuga.pdfIn PDF document text
    • http://portcharlottehomesforsale.net/uploads/1/3/0/3/130379363/688ee7.pdfIn PDF document text
    • http://gulfislandpickers.com/uploads/1/3/0/6/130605351/40fa18.pdfIn PDF document text
    • http://longstemteddys.com/uploads/1/3/0/6/130621897/8cc923b60f15e20.pdfIn PDF document text
    • http://www.capepostalstory.com/uploads/1/3/0/2/130272403/datepa.pdfIn PDF document text
    • http://lloydstreeter.com/uploads/1/3/0/8/130814226/018282f7e68e.pdfIn PDF document text
    • http://parentsshopusa.com/uploads/1/3/0/6/130639197/f92c5.pdfIn PDF document text
    • http://hiphophopewaco.com/uploads/1/3/0/2/130289235/zotinanivem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.apache.org/licenses/LICENSE-2.0RobotoIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A3 2344 bytes
SHA-256: 2d35dbb84a910c1b6f997f46d0381016e91ed83d5053e8686b17b1c788ed5224
font_01_sfnt_off0000a364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA364 11632 bytes
SHA-256: f6c725f6008eff9299cb71042f92f858fe1fd9b39dd3cbc1761cbe50a6080722
font_02_sfnt_off0000c906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC906 3192 bytes
SHA-256: 18f472009c58ae76a8cc3fe6aef841736a0390e428d2d0c2a7e032355909c327
font_03_sfnt_off0000d442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD442 17656 bytes
SHA-256: 650263c41bdfeb56ea4f11f78c6f7c0e6758bf2ee1cdc92376d3325098abd83b

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