Malicious PDF — malware analysis report

Static analysis result for SHA-256 b737660e358bc57f…

MALICIOUS

PDF

43.7 KB Created: 2020-03-25 01:02:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 3b27e1f4e5826cd94d5a6013e637c80b SHA-1: c1612d1ba38f0f5f41e4386e56fb3f48ee1c1c9e SHA-256: b737660e358bc57fdfd674b4ecd5142af0cdd8c8f1d66f2c50848bc2c252fe69
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to various domains, a technique often used for SEO manipulation or to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a likely attempt to drive traffic or host malicious files across a network of sites. No scripts were extracted from this sample, limiting the analysis of direct payload execution.

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://lwlegalservices.com/uploads/1/3/1/3/131380343/131380343.html#formulas+del+perimetro+y+area PDF link annotation
    • http://noddfw.com/uploads/1/3/0/3/130323182/faxupuvez.pdfIn PDF document text
    • http://www.hanlinsci.org/uploads/1/3/0/7/130739746/87721243943d.pdfIn PDF document text
    • http://themorethanbasketball.com/uploads/1/3/0/4/130476172/ce5bf55d312382.pdfIn PDF document text
    • http://christianwarnerphotoco.com/uploads/1/3/0/7/130738929/1a2cc7d2.pdfIn PDF document text
    • http://gingermelon.ca/uploads/1/3/0/3/130379219/a1de1.pdfIn PDF document text
    • http://33wontariost.com/uploads/1/3/0/5/130551449/7648b8b8dddc.pdfIn PDF document text
    • http://seanmcanulty.com/uploads/1/3/0/3/130312986/8322899.pdfIn PDF document text
    • http://ecperfect.com/uploads/1/3/0/4/130489467/pixowejepuxopamab.pdfIn PDF document text
    • http://www.landlcandles.com/uploads/1/3/0/2/130270897/bisekerexipasozum.pdfIn PDF document text
    • http://hostmaster.originfp.co.uk/uploads/1/3/0/6/130639032/bbed6.pdfIn PDF document text
    • http://bearcreekpd.com/uploads/1/3/0/6/130621472/luropovujidaxuvaf.pdfIn PDF document text
    • http://designingmoose.com/uploads/1/3/0/6/130605034/ba471.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 8044 bytes
SHA-256: 7ad06548eca260df06ba822246cd28232e4b34f0d3e4781cbaf6f2cb4aa887c6
font_01_sfnt_off00008100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8100 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea
font_02_sfnt_off00008a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A69 16096 bytes
SHA-256: 65ca2fa633a49bc637c245e3469a24bec82cbb291b9200d770c42ee2df1588ac

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