Malicious PDF — malware analysis report

Static analysis result for SHA-256 94593fb4371ec3bf…

MALICIOUS

PDF

54.6 KB Created: 2020-06-05 14:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: a3e0ad202146131a25ce5a4cc1c7dacd SHA-1: b0517f0cb4f071f35ff35938c38524ddfdc22cee SHA-256: 94593fb4371ec3bff2d004f23f141ec82c466f3f983a891fa742278ccf492d72
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous external links, many pointing to suspicious domains, indicating a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains a URL that aligns with the suspicious external links found, suggesting a lure to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://74-123-73-178.mgwnet.com/uploads/1/3/0/5/130551805/130551805.html#ejercicios+de+tecnologia+2+eso+resueltos PDF link annotation
    • http://ronswalktalks.com/uploads/1/3/0/7/130776089/zakumusexomisu_mazewarolusepo_xexelisidifu_bujigezefakapus.pdfIn PDF document text
    • http://webmail.achesawaymassage.com.au/uploads/1/3/1/8/131871799/82bf59.pdfIn PDF document text
    • http://chasingchrist.com/uploads/1/3/1/6/131637349/botesigodomaduma.pdfIn PDF document text
    • http://kristenbarneich.org/uploads/1/3/0/9/130969818/58dcedc2.pdfIn PDF document text
    • http://allanscottlogging.com/uploads/1/3/1/0/131070291/697403a6.pdfIn PDF document text
    • http://mta-sts.mail.appalachiandriving.com/uploads/1/3/0/5/130552053/2676833.pdfIn PDF document text
    • http://supercleanbournemouth.co.uk/uploads/1/3/1/4/131437784/efa928d46.pdfIn PDF document text
    • http://enjoythecbd.net/uploads/1/3/0/2/130291908/diwurobodebuwim-pemusopofat-mamodozofo-niginebaseraso.pdfIn PDF document text
    • http://webdisk.psychologiepraktijktilburg.nl/uploads/1/3/1/1/131164093/01c812171200.pdfIn PDF document text
    • http://74-123-73-178.mgwnet.com/uploads/1/3/0/5/130551805/terms.htmlIn PDF document text
    • http://74-123-73-178.mgwnet.com/uploads/1/3/0/5/130551805/dmca.htmlIn PDF document text
    • http://74-123-73-178.mgwnet.com/uploads/1/3/0/5/130551805/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zenijafak.files.wordpress.com/2020/06/70890173996.pdfIn PDF document text
    • https://rarimuvu282494435.files.wordpress.com/2020/06/74316780943.pdfIn PDF document text
    • https://dibozulanid.files.wordpress.com/2020/06/77749581418.pdfIn PDF document text
    • https://telemuwivine.files.wordpress.com/2020/06/tavix.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

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_off0000a513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA513 12244 bytes
SHA-256: 27c935c7a0c4e308f9570d1c48014ab75bc2f4ad76f60137ef088ed72aafb596

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