Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c285729849162cf…

MALICIOUS

PDF

51.0 KB Created: 2020-04-14 22:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8043c88529724cba63d44013b8573f6d SHA-1: 147c7ed69fc60e22e003dd3e222e95410ec1a373 SHA-256: 6c285729849162cf96360d431ae26d7dcfd0c64f69271f4f2321b7e2be44c3f7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many pointing to PDF files with numeric slugs, suggesting a link farm or SEO manipulation tactic. The document body contains text related to 'Brampton manor 6th form', likely a lure to attract clicks to the embedded URLs. No scripts were extracted, but the presence of numerous external links indicates a potential for redirecting users to malicious 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://3003exposition.com/uploads/1/3/0/7/130739996/130739996.html#brampton+manor+6th+form PDF link annotation
    • http://bpmsreunion.com/uploads/1/3/0/2/130289564/titutev.pdfIn PDF document text
    • http://immediateinsight.org/uploads/1/3/0/7/130775952/purekisomafu_mamosipeluw.pdfIn PDF document text
    • http://juliabobrova.com/uploads/1/3/1/3/131379280/nurufizox.pdfIn PDF document text
    • http://same.earth/uploads/1/3/0/7/130775567/8441033.pdfIn PDF document text
    • http://r3healthandfitness.com/uploads/1/3/0/7/130775653/0ca2e.pdfIn PDF document text
    • http://simplysmallliving.com/uploads/1/3/0/2/130272504/dunurewogologiw_mapaj.pdfIn PDF document text
    • http://consignmentyourway.com/uploads/1/3/1/4/131453861/44796aa1f4.pdfIn PDF document text
    • http://plans2prosper.com/uploads/1/3/0/6/130639491/11fd7babadb1d.pdfIn PDF document text
    • http://farishtrust.org/uploads/1/3/0/8/130874370/fepim_kujinoj_vabuza_fijapelekabaj.pdfIn PDF document text
    • http://themoonandmeapothecary.com/uploads/1/3/0/7/130739539/lawabilusameku.pdfIn PDF document text
    • http://alexiosai.com/uploads/1/3/0/8/130813079/nogixenefugoxiv.pdfIn PDF document text
    • http://lexiraefittraining.net/uploads/1/3/0/7/130740255/zinen-neviduremije.pdfIn PDF document text
    • http://surveying.fyi/uploads/1/3/1/4/131409309/kuvaramolega.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_off00007ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC8 9132 bytes
SHA-256: 9c99a04d4ec296300ff8378bf19fc710c0625366de045b80a2b0a3ea323f3616
font_01_sfnt_off0000a164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA164 2648 bytes
SHA-256: 2c32c498f23db3cae400dac070c72b38d41a5d5dbe5041cbe08e7cee44e1acfd
font_02_sfnt_off0000aab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAB4 16040 bytes
SHA-256: 5b7ff9d959bb2883b1b0c2500d24f4d9915860f6a4226734142cfc8a0ca39c60

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