Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d4ff053ec0501b…

MALICIOUS

PDF

48.4 KB Created: 2020-03-10 02:38:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 00d36448da2feacb1a991fdd32665f1c SHA-1: 66c5883dd62a0bcb20105f619071732dc6bddd90 SHA-256: 45d4ff053ec0501bdfd41f590bf3363199ae4e72078c60630bdd0bf2557518c3
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly indicated maliciousness. The document body contains garbled text and what appears to be metadata, but the primary malicious activity is the extensive link farm pointing to various PDF files hosted on different domains.

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://91alexanderpde.com.au/uploads/1/3/0/7/130738499/130738499.html#keberadaan+jentik+nyamuk+aedes+aegypti PDF link annotation
    • http://b-kool.com/uploads/1/3/0/3/130379769/pijixudo.pdfIn PDF document text
    • http://www.2bsaltnlight.com/uploads/1/3/0/2/130272291/5589cc07.pdfIn PDF document text
    • http://victoryconsutlingtravel.com/uploads/1/3/0/3/130313414/1702330.pdfIn PDF document text
    • http://www.saywhat.shop/uploads/1/3/0/7/130738781/a79823a8e558.pdfIn PDF document text
    • http://mta-sts.mail.shputters.com/uploads/1/3/0/4/130435820/5208499.pdfIn PDF document text
    • http://meredithlagerman.org/uploads/1/3/0/6/130604145/eb21fb5fb.pdfIn PDF document text
    • http://brendaerickson.com/uploads/1/3/0/6/130640015/rirularizurusi-zejov.pdfIn PDF document text
    • http://kaleidoscopecf.com/uploads/1/3/0/8/130813546/wajabiku.pdfIn PDF document text
    • http://cpanel.twosunsdoula.com/uploads/1/3/0/4/130488091/6520584.pdfIn PDF document text
    • http://textweight.com/uploads/1/3/0/6/130605448/f59e2b8426e7.pdfIn PDF document text
    • http://cpanel.yourasheville.com/uploads/1/3/0/7/130775853/e0fdd08128dc6f.pdfIn PDF document text
    • http://emmanderson.com/uploads/1/3/0/5/130588434/wumuwivujubizigo.pdfIn PDF document text
    • http://urbanrips.com/uploads/1/3/0/7/130740610/181767.pdfIn PDF document text
    • http://mysteinertech.com/uploads/1/3/0/7/130739789/vidunigol-moderinuloba-werep-gezajowebubi.pdfIn PDF document text
    • http://baddesign.co.uk/uploads/1/3/0/7/130776814/4566744.pdfIn PDF document text
    • http://swithearts.biz/uploads/1/3/0/8/130813732/6865620.pdfIn PDF document text
    • http://comedicculturejamming.com/uploads/1/3/0/5/130539992/2169592.pdfIn PDF document text
    • http://mysustainablefashion.com/uploads/1/3/0/3/130313230/a22bead.pdfIn PDF document text
    • http://www.alphaestifanos.com/uploads/1/3/0/2/130273850/valumugeruxisef.pdfIn 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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9288 8292 bytes
SHA-256: bcc40734799065ecc338ddbc63e46562fd6bf27f1720d44e3229a5d84c7a49d9

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