Malicious PDF — malware analysis report

Static analysis result for SHA-256 733df63eba651212…

MALICIOUS

PDF

39.8 KB Created: 2021-06-22 15:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 26b112300fd5529e36fc754e153c1515 SHA-1: 0150643a1dc9877e2e05bc48c9f25848565f70a2 SHA-256: 733df63eba651212d5bf45f7f838cca3955619b14a93ac6112c513695233d80e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7981

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://crysiq.ru/uplcv?utm_term=angry+birds+movie+1+full+movie+in+tamil PDF link annotation
    • https://pass-eco-energies.com/ckfinder/userfiles/files/35924835195.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/80703714777.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/94031154817.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/8ev1kpvif2bp0otomvhtlsqun0/bijabivabakudasuwegal.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac02fd5a4cc---gibezufewajoj.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c2665845e968e28257af2122ff958be7/xupikuwanisuxinelirara.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/594e2fbd9350513299c1c107e48fce1c/feguxewikeduzazebibavad.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/jitezijividujitonaveju.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/wobewoludujafaxisasozon.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/4ffa550b0ab6c1522d0f02d64048b2b7/60678629130.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4c1a0eee8---pufokow.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/3ef9b9152439fc0976d5c7d9ef877fa7/77420551126.pdfIn PDF document text
    • https://iwistw.com/upload/files/58800286372.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/68446183993.pdfIn PDF document text