Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b49bb61bf90478e…

MALICIOUS

PDF

59.6 KB Created: 2021-09-15 22:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: ece7dd502e644b0e9277f3b3d68bd173 SHA-1: 374f0644a30f4a8abab6634d7fb800a9f63377d9 SHA-256: 4b49bb61bf90478eaa8c1a38cec92c7e1cc2b6183ce244d81900f83091789d67
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it's likely a phishing or trojan delivery mechanism. The numerous embedded URLs pointing to various domains, including compromised CMS uploads and link farms on disposable hosting, suggest an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly imply it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8279

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://irlanc.ru/uplcv?utm_term=3d+galaxy+live+wallpaper PDF link annotation
    • http://delfosventures.eu/userfiles/files/vabebejaziw.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/liluvijilaf.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613caae2d3604---xiwovuzuxanunupedazogogis.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/48419846706.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/93998699407.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/89237343138.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10108835273.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/46907877408.pdfIn PDF document text
    • http://staropolski.net/Upload/file/50740210293.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/bajaxogajapilo.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/83cd722bba7fff501efc3869e5ddc914/98259191915.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132619ccc141---wiwojeruvaragi.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/91583152569.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/851314e3fc4b22676250dcec43c22871/lazil.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/zunexupobeveba.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/630aa40b58a7eb855c8a3fcaba75b35a/gaxowasowedano.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/161352aba1c984---zasegakosudas.pdfIn PDF document text
    • http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/taluroxawavozazunag.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/220480846.pdfIn PDF document text
    • http://sieuthimaynhapkhau.com/upload/files/40279686592.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/131c89944e5154d4d0c31c4b7043d6b6/nugogobi.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee4aecdaec---mogewuramikut.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/salagetetozuje.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_off0000c53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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