Malicious PDF — malware analysis report

Static analysis result for SHA-256 646cde2a4629f99d…

MALICIOUS

PDF

58.4 KB Created: 2021-06-06 08:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 04818c8772b9d6ff777e2e6d7bd97d82 SHA-1: 5ca412c17dcaf7324c1c55f420cfbc271abffec9 SHA-256: 646cde2a4629f99d9a3a3400a8257d1d1e002d56cbf0679ab4faf99c63c0f69b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further malware or phishing. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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 https://oniceh.ru/uplcv?utm_term=how+to+draw+iron+carbon+phase+diagram PDF link annotation
    • http://alemotta.com/resources/original/file/81372253576.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079892d4baa7---xokufuguwekijupaxebon.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/2967a9fdcfe0ec864551f3e22a3bbf14/babudajokiwodejebupuk.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/34513ba8b0c0b79882fb1e37108d7ab6/gizagikapogiwojanimepizi.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/1e302ad5e6c7d14e75303d804990560f/sobavif.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/23588244995.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/e631b466a49ca8357be435c3c45b4d90/1254616035.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2d8fe268e---lunobij.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/95488cc5a1fe0138560e27a4ff3443ce/sodupeganogebumixarugew.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/zupenexekufoxenovar.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5bd6bacce---53815670900.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/386f1759f5b331b48ae6b8292b0a7cb1/bozanejupomewesasatogix.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/7bf7bd087db78449b3aed4c6c89321fb/dumip.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/65c98d31ce8056c253dd189fb0b00619/34596601337.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073ae26b63a1---35374936396.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/1c1bd3ecedbc85c4bc6d864b47664551/fuwebaratudaverirufasibi.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/motopez.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/ba9eaeb612a471a4b75b536615215221/butamudedemowupa.pdfIn PDF document text

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