Malicious PDF — malware analysis report

Static analysis result for SHA-256 8709426cb49532c2…

MALICIOUS

PDF

75.0 KB Created: 2020-04-01 12:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8fa6e8791bc11aac04f4196624f93b23 SHA-1: a344e2eda049cc0a34d48179067e247f8933958f SHA-256: 8709426cb49532c2b266b3197ae55c5f4be9a73a2d26df8f95d11e2f2592623e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a URL that matches one of the embedded links. This suggests the primary purpose is to redirect users to a network of websites, likely for malicious purposes such as hosting further exploits or phishing content.

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://leadinglegalservice.com/uploads/1/3/1/4/131454396/131454396.html#como+hacer+figuras+con+caracteres+del+teclado PDF link annotation
    • http://mychicagorides.com/uploads/1/3/0/7/130738956/pebizewe.pdfIn PDF document text
    • http://liftmeup.gallery/uploads/1/3/1/0/131071277/buwaruda_babokoduk_bikagokewi_dotuj.pdfIn PDF document text
    • http://tommigirlsellsjax.com/uploads/1/3/0/6/130621654/lemepi.pdfIn PDF document text
    • http://mountainairdance.org/uploads/1/3/1/4/131438876/4432462.pdfIn PDF document text
    • http://nchonorflight.org/uploads/1/3/1/3/131398386/729918.pdfIn PDF document text
    • http://postandquiet.com/uploads/1/3/0/6/130604032/betodafa.pdfIn PDF document text
    • http://drakebettis.com/uploads/1/3/0/7/130775831/xanipalapulitativow.pdfIn PDF document text
    • http://emeclthg.com/uploads/1/3/0/3/130323207/dokogubadugo-winokiz.pdfIn PDF document text
    • http://chirocamden.com/uploads/1/3/0/3/130313005/manugiwegewafe.pdfIn PDF document text
    • http://wccscience.com/uploads/1/3/0/6/130640105/wewinibaxano-pifaposoja-daxujefiluxasu-kulorulisufe.pdfIn PDF document text
    • http://jorcausa.com/uploads/1/3/0/5/130539637/6628418.pdfIn PDF document text
    • http://darleydaleequestrian.com/uploads/1/3/0/8/130813736/luvuwajepevi.pdfIn PDF document text
    • http://getseniorlivinghelp.com/uploads/1/3/0/7/130739664/4469389.pdfIn PDF document text
    • http://yoursfurrever.com/uploads/1/3/0/6/130604177/xebizegekogiwiwagake.pdfIn PDF document text
    • http://ksdeerhunts.com/uploads/1/3/0/5/130540567/6297251.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
    • 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
🗂 Part of campaign: drakebettis.com 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC4 26028 bytes
SHA-256: 37da65626be46c03d3e5e4f1fb122dc59b28de4940977a19e33abfb63c919275
font_01_sfnt_off0000d1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DD 15140 bytes
SHA-256: bc642918f24621682a7f6fe4009c0a7914ec70e1d566ac5309183dbdea2f1cf6
font_02_sfnt_off0000f96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96C 20276 bytes
SHA-256: f2942d447d8b514e73b6fc9621afb3f68dcff19fd52d905a38f2e82c535d78b9