Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b82b49b4053f64…

MALICIOUS

PDF

62.3 KB Created: 2021-08-09 14:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: acb883fc0cb2d9b60a03ac0683613b00 SHA-1: 982c19324b894416eaa63c69cbedbc9f142bcaae SHA-256: e1b82b49b4053f64c1131b6af924e797b1d8d0d935843307df83f495f6ef2612
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and flagged by an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and disposable hosting. These links likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9043

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://catamma.ru/uplcv?utm_term=possessive+pronouns+exercises+for+grade+3 PDF link annotation
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082434f8751c---duwawufumikoxefimojewodu.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102dc4994764---tewojibixeboneguku.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16090054a5f008---76760969594.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609905cd2a596---niradokibebovagi.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/30675617628.pdfIn PDF document text
    • http://thienthaopc.com/upload/FCK/file/medijug.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/98c470bfbe59329edafcd69f6208baa0/89594481591.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd2cc4ab13---laxezebubiwiboxazibog.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/34a4263cf57beaf2a90f0a396176d134/92677520509.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/75740174552.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085d4a44e879---75816568895.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021070202003273499.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/33006117986.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/9liruskuu6d2mji2p2bgloh1lu/35512115057.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/2gl17avc747ovgov120vvesbbg/sologixirel.pdfIn PDF document text
    • https://jetaime-shop.com/files/kesab.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4093be3950---68555757020.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/b89934aa82b4496ee330af7653cd5ea9/zurodad.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/13043972099.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/3f60d48c7006324985f5424cd3375882/tezeluvuv.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607606506cb4a---71807411186.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/pojutotupovexoturo.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/54791668482.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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