Malicious PDF — malware analysis report

Static analysis result for SHA-256 85684eaedad8c24d…

MALICIOUS

PDF

92.8 KB Created: 2021-07-26 20:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b0a79d0a512e42dce965cfcd8daaffa6 SHA-1: eea3225af91675e208b9318769fa4960010aceea SHA-256: 85684eaedad8c24d9450badef351c671e51f3dd2bc3859163bd960ae44c99e9e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS upload directories or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The primary attack pattern observed is the use of a link farm to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9034

Heuristics 5

  • 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.
  • 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://akicgiyim.com/userfiles/file/lefufanowukedesabefe.pdf In PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077605a9d7e7---votakex.pdfIn PDF document text
    • http://waltonjohnsonfamily.com/clients/870437/File/wezujapoxazodanawinurum.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/2114479553.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/9e27eb17ef8e159efc3bf193aed96838/bibuvafixoli.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093f55658f6e---welajiximax.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/37885350858.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210714_150921.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/90475601155.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e81ef1f1e13---13807570120.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/qlgvc40d4kvp8dss3nu3mq98uo/86839696584.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606e59fdd8c63---10079232546.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/60583478032.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609d689750ca7---wuvesaj.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/d8d0cf0e90a70534d69259e1840bc7ad/dirixorinabojubidokeda.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021429256548437.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160718dc022fae---kikakevuxito.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/ae30929c0602765b0280257b42217739/86152689291.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9bcc052a1b---69380698417.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8b230eb7ae2b091d7dc8942135c4aa6/40046142592.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/bavag.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/pkla9b37hqphovf5rftsbviroj/rexinal.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/letedivu.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/jufiguvada.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=monografia+psicolog%C3%ADa+forense+pdfPDF link annotation

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