Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c476e2df79b2d03…

MALICIOUS

PDF

52.1 KB Created: 2020-03-17 09:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: d9b34362985913b2398f46d7681fc26d SHA-1: c983bba1af7415777f09eb98bb7eb5f2e29461ca SHA-256: 7c476e2df79b2d034237fb1ba7be88d9b6bc4283d033098fe953e6200c3c7152
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to redirect users to potentially harmful websites.

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://minnesotahydrographics.com/uploads/1/3/0/6/130604166/130604166.html#que+es+la+honestidad+academica+wikipedia PDF link annotation
    • http://troybuyshousesindiana.com/uploads/1/3/0/8/130814976/4983989.pdfIn PDF document text
    • http://mayrapinedanotary.com/uploads/1/3/0/8/130874163/7423492.pdfIn PDF document text
    • http://thenxtblog.com/uploads/1/3/0/3/130313398/riseset.pdfIn PDF document text
    • http://sitemove557.com/uploads/1/3/0/6/130621613/vipuzogorexukejix.pdfIn PDF document text
    • http://www.attleborodemocrats.org/uploads/1/3/1/1/131164364/974898.pdfIn PDF document text
    • http://www.equine-everything.com/uploads/1/3/0/5/130539825/refawibexesite-jaxepugowibalal-pepigid.pdfIn PDF document text
    • http://iamdegoat.com/uploads/1/3/0/3/130323390/d8827a920.pdfIn PDF document text
    • http://budyzook.com/uploads/1/3/0/6/130621808/suragojat-pizezebedivaj-febaki-xifasizumi.pdfIn PDF document text
    • http://noapparentreason.net/uploads/1/3/0/3/130313024/xuvopug.pdfIn PDF document text
    • http://timelesstreasures-us.com/uploads/1/3/0/3/130323517/2979a0ee2c.pdfIn PDF document text
    • http://phorion.com/uploads/1/3/0/6/130604342/5347226.pdfIn PDF document text
    • http://3828riverroadbricknj.com/uploads/1/3/0/5/130588434/6889532.pdfIn PDF document text
    • http://eventfullondon.com/uploads/1/3/0/2/130270738/zosivisivobuzavabi.pdfIn PDF document text
    • http://sabertruthtiger.com/uploads/1/3/1/0/131071159/75d91ea.pdfIn PDF document text
    • http://maralynhargrove.com/uploads/1/3/0/4/130435667/vijemazezimojer.pdfIn PDF document text
    • http://74-123-73-185.mgwnet.com/uploads/1/3/0/6/130620858/xufuz.pdfIn PDF document text
    • http://mail.eraconsultants.com/uploads/1/3/0/6/130639840/nifus.pdfIn PDF document text
    • http://govfilingsonline.net/uploads/1/3/0/4/130436343/zutaxorofetojifu.pdfIn PDF document text
    • http://pedenportfolio.com/uploads/1/3/0/4/130436197/ab14cc9e.pdfIn PDF document text
    • http://fsucapitalgroup.com/uploads/1/3/0/5/130539642/memexefisomokej-vefiveviriram-roxilodi-savifokilalu.pdfIn PDF document text
    • http://apexmspta.org/uploads/1/3/0/2/130289765/wuwut.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AF 9012 bytes
SHA-256: 78451fa7af393ed9ab232250725da033d655492fcfba547498c64fb1a029cd2f
font_01_sfnt_off0000a226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA226 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
font_02_sfnt_off0000ab8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB8D 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63