Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5c9dc56f1a244c…

MALICIOUS

PDF

63.5 KB Created: 2021-09-01 20:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2d4a813b248191dc7fbc964cdb2c7f8f SHA-1: 40d0be6a1b2a2b8277d57cfce768beec18273fdf SHA-256: 1a5c9dc56f1a244cd80d9bc35c1eb3e98967ae82a6e332462ce753d0d4456c48
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites. The presence of JavaScript and the link farm structure suggest an attempt to redirect users to malicious sites, likely for phishing or to download further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6403

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49fd0714ae---povibijegalat.pdf In PDF document text
    • https://mollis.rs/files/fosabusolatub.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/24123883939.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/13450883357.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/aa2c8f9f7ae7c56bdbc92d26747ab24c/89394859966.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074a7224377c---nexasuwasoguligifib.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/c7c6a42e8eb218c668874c4df79aa106/28116749186.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/6942601900.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/zusukuxibasewop.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/12544358390.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/23860005799.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/waporexubuvezimiwiwus.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160824817c185b---6017047983.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/52205601919.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/40974517688.pdfIn PDF document text
    • http://agriturismofattorialucciano.com/ckfinder/userfiles/files/fepulogigu.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/9daba2fb96d1a5fc678ef77c10ac41f8/bunal.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/jaxemal.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0daf00571d---gexikikufewolobi.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16085678de7e30---73133809533.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/mababumusomamewa.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfe569acb1---12796769602.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160885838905e4---54535061037.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16086a4109175c---39018403885.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/99342919085.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=delete+pdf+pages+softwarePDF link annotation

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