Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc96bd7c73a2dcd…

MALICIOUS

PDF

99.2 KB Created: 2021-08-20 06:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: af78bab2fc247a57657010b7e39534d7 SHA-1: 3e6150826a49679b86429676c1f844ce544b85bd SHA-256: 4cc96bd7c73a2dcdda6c1abbe4433f251b5bc57d9a6bf5a9dc5cc5134193a80a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which appear to be compromised WordPress uploads, suggesting a link farm designed to host malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be01af69ef8---1179677389.pdf In PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d801b87d43c---gikoxabobumopuzanalenele.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca673eab8d---mirix.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/14153357524.pdfIn PDF document text
    • https://digireg.es/upload/sojazowot.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/eu4hblk4afq4qkupa70ldjp5oh/wodaguretex.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/61143091559.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0945cab6b4---37643207350.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b9399ffe3---76349026764.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/zejojopezanoxapafupifogu.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d63aa8a8e414188aa90e644080dd9567/76482030600.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/sejemas.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/3734694002.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c03dc3ad95---vobinomemegavajefup.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/jobolivalujuruzusese.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/82089211230.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608def8f6bd90---97184612669.pdfIn PDF document text
    • http://amdind.com/userfiles/file/sozutiwelixofopijele.pdfIn PDF document text
    • http://cityfate.com/files/files/10673687748.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/weriwinabolag.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/sijejumawoguzisonazenena.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/830704438.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce5da1bf1---batobezofurusu.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae259ba707---darafudu.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/3124961540.pdfIn PDF document text
    • https://successstudio.net/userfiles/file/pazesenunexevudajedupiwes.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/35007209056.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/67102176586.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=convert+pdf+to+dwg+bluebeamPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13619 11004 bytes
SHA-256: 81c88717761739e881813d463c9080854890787b764ce8d59443b3c07a070685
font_02_sfnt_off00014f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F51 17684 bytes
SHA-256: 7d950e7024c52bda0f3054bc02fc4ac4943d38e5e8497f152838b2eadc7eacf6

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