Malicious PDF — malware analysis report

Static analysis result for SHA-256 c939d058797c525e…

MALICIOUS

PDF

41.9 KB Created: 2020-03-19 01:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c5062f40480e176288d3e2aa4709ff8d SHA-1: 9e01d10e0400600368bae9bdc0c3d9c4f729e650 SHA-256: c939d058797c525eded2577dd53e9c8bca238c441bd0d82bbb4a999cd7aadbb8
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, pointing to various PDF files hosted on different domains. This technique is often used for SEO poisoning to drive traffic to malicious sites or to distribute further malware. The ML classifier strongly supports the malicious nature of this document.

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://newperspectivemedical.com/uploads/1/3/0/9/130969270/130969270.html#proceso+de+elaboracion+del+presupuesto+de+produccion
    • http://miskatonic-journal.ca/uploads/1/3/0/8/130814717/3365252.pdf
    • http://mail.tallentdesign.com/uploads/1/3/0/4/130489359/satojasipigufuzage.pdf
    • http://berkeywaterfiltersource.com/uploads/1/3/0/4/130476119/9c2a802a.pdf
    • http://jacbrondum.com/uploads/1/3/0/5/130543682/wonoxeloroje.pdf
    • http://www.straightfromthetrainersmouth.ca/uploads/1/3/0/5/130588393/bajor.pdf
    • http://majesticmermaidboutique.com/uploads/1/3/0/9/130969220/welekekadoloxig.pdf
    • http://lambaborgdesigns.com/uploads/1/3/0/9/130969076/baxekakaxalowe.pdf
    • http://greenshotsrealestatephotography.com/uploads/1/3/0/6/130640239/sesetufofixibikezeg.pdf
    • http://sweetlandstudio.com/uploads/1/3/0/7/130739489/3989343.pdf
    • http://mouse-monkey.com/uploads/1/3/1/0/131070765/vugevowetisufafivir.pdf
    • http://keyscientificinc.com/uploads/1/3/0/4/130436058/9e1023.pdf
    • http://mycrystallounge.com/uploads/1/3/0/2/130291471/d7d427b6dcd3d.pdf
    • http://canihaveacoupon.com/uploads/1/3/0/9/130969449/5438982.pdf
    • http://moniik.nl/uploads/1/3/0/5/130539553/xofimaz.pdf
    • http://mistymeadowsfarm.net/uploads/1/3/0/4/130490193/0f3eb65dcfd.pdf
    • http://www.gettoit11.com/uploads/1/3/0/5/130550926/xuvupaponab.pdf
    • http://www.johnanastasio.org/uploads/1/3/0/9/130969790/8891494.pdf
    • http://bluecouleecoffee.com/uploads/1/3/0/5/130544086/gasipitutu.pdf
    • http://spydersupportsolutions.com/uploads/1/3/0/5/130588885/jinuwovujavibe.pdf
    • http://sheet-and-roll-print-and-packaging-media-conversion-uk.co.uk/uploads/1/3/0/3/130323642/dogawawuzofe-kemumez-binusupuxowum-waniz.pdf
    • http://strengthwithinyourself.com/uploads/1/3/0/5/130550901/mewezazakokobil.pdf
    • http://mentalhealthmeltdown.com/uploads/1/3/0/8/130814408/0da1590.pdf
    • http://www.activoaccounto.com/uploads/1/3/0/3/130323146/7198ffe9eba4851.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a10.bin
44a1b7701b2ac1e89e1a187599c965cded30e59e17aff8978a3ad318c0b25db0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A10 8080 bytes

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