Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2e442ebe6a188e…

MALICIOUS

PDF

103.6 KB Created: 2021-06-19 14:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 84f1572eca37d2e8735a2f4a8eb1fc10 SHA-1: 6dacbcca7991499d3f108e9396ff94350976eed6 SHA-256: cf2e442ebe6a188ed822cf31d8a39b42a28406584fcc8c49484662f4774f8e62
96 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, appears to be a lure related to printer configuration, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/sobgnli2t06rgt0d0k1933d71b/tozobewagomuja.pdf In PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0acd71684b---kusozopibibo.pdfIn PDF document text
    • http://mextro.de/upload/files/mipusogitogizefe.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/fd768260e2e0f3e2cd033539c9bf82f0/faxelenifunekilogupo.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/jewepi.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606df89531d2e---tedudigidafolonubapu.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/81732965943.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/roserozo.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46baae4ae3---zuxoguguputolapiguti.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/cc3a16468e6013ba707e1e8d77b6aa75/bajivuvuxu.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/i9i56fuuejq1og8duhfav19veb/xaremexomip.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ff0ebe5bd---42809384613.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/tirutobebotajikamanezedi.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070fd4b25090---42856280866.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a5d85c9ac---75460076183.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/7cfsgdqcm4n89g2dufq8isd4kc/zenuxaranegixirerojenajo.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8a5b663ae---34021534799.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/a22k2rofm3l46g9t4lnjc0h1d2/nigotetenamobosezomojefo.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aafb3db7d---silidesopokimerosoki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=print+configuration+page+hp+p2015PDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000149fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FE 5400 bytes
SHA-256: f52541b56cc8fee6911e13d2679cd4bb50b16571f8279d1ec742de35feaa99f3
font_01_sfnt_off00015c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C55 11192 bytes
SHA-256: 0595cdcfabde81ab59b2daca4db994fe70ae202bb0f46f43a3d2d58e8db7eae7
font_02_sfnt_off000182be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182BE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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