Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3249010c57153a3…

MALICIOUS

PDF

42.1 KB Created: 2020-06-05 19:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eddee0f0c7b01eb884c18f6b045ccb2a SHA-1: d9b689476f40e863e26e6ea8a293eabc6e124566 SHA-256: d3249010c57153a35c28828c39c01111cccc49c8dac6f2557c1ebfe97e353276
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, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. The embedded URLs point to various domains, suggesting a link farm designed to direct traffic or users to potentially harmful sites.

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://allperth.net/uploads/1/3/0/5/130590538/130590538.html#new+york+guide
    • http://clarawilson.com.au/uploads/1/3/0/6/130621505/1d82739785749.pdf
    • http://weddingperfectatlanta.com/uploads/1/3/0/2/130288514/4667869d1b430ac.pdf
    • http://tuslawmustangsfootball.com/uploads/1/3/0/4/130489650/lubenezi.pdf
    • http://microscopedesign.com/uploads/1/3/0/2/130291478/gizubix_lewusinazupore_wixupuze.pdf
    • http://clickingpays.net/uploads/1/3/1/4/131437106/nudovomarimubas.pdf
    • http://dymobilenotary.com/uploads/1/3/0/5/130540619/sojab-gokego-musovoruxuja.pdf
    • http://harvestchurchohio.com/uploads/1/3/1/4/131413905/pizolobagujubof.pdf
    • http://hostmaster.swlondonrenovations.co.uk/uploads/1/3/1/1/131164322/jupibotilusosinami.pdf
    • http://tvbrighthospitality.com/uploads/1/3/0/9/130968949/f6789aa5d14ae6.pdf
    • http://consumelesslivesimply.com/uploads/1/3/1/3/131397981/buzupuniwaduze.pdf
    • http://rosemikayla.com/uploads/1/3/0/6/130620899/5647808.pdf
    • http://ttcuniversitydays.com/uploads/1/3/0/4/130476784/besosazazoguxe.pdf
    • http://allperth.net/uploads/1/3/0/5/130590538/terms.html
    • http://allperth.net/uploads/1/3/0/5/130590538/dmca.html
    • http://allperth.net/uploads/1/3/0/5/130590538/policy.html
    • http://clickingpays.net/uploads/1/3/1/4/131437106
    • https://texinodus.files.wordpress.com/2020/06/fuvitejolarowepalogexanep.pdf
    • https://lixamajifeki.files.wordpress.com/2020/06/somof.pdf
    • https://zizixabaga.files.wordpress.com/2020/06/bafamurejutitadon.pdf
    • https://xefudud.files.wordpress.com/2020/06/povotokinupapejo.pdf
    • https://jamaxunofum.files.wordpress.com/2020/06/91708618581.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_off000078ac.bin
be3b767d5e50c4bd31731060cc7463b132035e92d088476066b08a94941134ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x78AC 10528 bytes