Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe3666f626aaee8…

MALICIOUS

PDF

64.0 KB Created: 2021-08-03 00:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 41d1900c7b01ce02fe94e0cacf57f691 SHA-1: a1d9b5d53d27b07dd11fcc0619a3540a2aa8e6d5 SHA-256: bfe3666f626aaee8d772730848975c971eda05b55124000c99b8611c5c56409e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads. The numerous external links, many pointing to compromised CMS uploads, suggest an attempt to redirect the user to malicious content or download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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 https://queure.ru/uplcv?utm_term=cuantos+tipos+de+planos+electricos+existen PDF link annotation
    • http://aisef.org/uploads/userfiles/file/file/31063754171.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/pddu1sndil9sehkmqvblantbuk/73575112938.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/68789835833.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/cabffe5f34e59963366398c9a329dc68/mefabasonikepogedumebepa.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/35877125479.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e33a9f76d---zopoxivuzopinuwezi.pdfIn PDF document text
    • https://ancoraeducacion.com/images/mafawapox.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/a803c85c9efb34fbb469e5e281bc91c7/25846778707.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/mexesevixepaxofosifijax.pdfIn PDF document text
    • http://edu-tur.ru/userfiles/file/12006686989.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/0r83g362h2muoal1hmh684bfic/dupakeduredipero.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/dc06bfd52fe08685c670227492755536/48573747506.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/f589fb484cb88d84c96a4701c7e188c9/99094934297.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/b5321dd2ab9c1fde742badef2bc18a92/nuzapapenikiwomewufam.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160b04b453258e---61345112106.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/solesalubivu.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/ql5d2sebprbos05680tf2h9gs0/75577717817.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/femisatavog.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/kagixojo.pdfIn PDF document text
    • http://contelex.it/userfiles/files/maxiforimobalakamipu.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/39951598876.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/72469dc28ab6e977be67c7de112986b2/gegamanavemokebuwobixoso.pdfIn PDF document text

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