Malicious PDF — malware analysis report

Static analysis result for SHA-256 7232cc31e526e7e4…

MALICIOUS

PDF

78.3 KB Created: 2021-09-05 21:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7aaa1649909e0a02d49373a4240eaf04 SHA-1: 5fc617b650d6e481000b81c7579806965585e27b SHA-256: 7232cc31e526e7e4f3d8bb6bf62f23349e0d96069ea45627438db535ed99af37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised CMS upload directories, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a strategy of using disposable hosting for link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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
  • 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 http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160baac684d230---fosupodamizivaset.pdf In PDF document text
    • http://okulsanmalatya.com/imgup/file/mibut.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/15350784666.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/33093358646.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/xogukalijasesid.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/fb55ed14d1810e62561301a23d14f84a/5506245220.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/b9c730dab18b12fc14aa4db523779580/62406084280.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16104d107b651b---simiroxujemapeguzuze.pdfIn PDF document text
    • https://armature.ir/cache/fck_files/file/kanuleni.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/81794c12b01ffbe04dd05152d9f0d9a9/87570071588.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/81347146533.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/xanawavolowakilige.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161255794de9cf---dugejusoxorid.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/0e67303dd1643a211529907de519530b/sibodaxawokofalagipesugok.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/37882971748.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b74a6b428---61997980381.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160af8dfb8700f---pedawuresiwepok.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210703_DCB61048154AB231.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/kogasobopapaweweme.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/mudozamalusifiwatuti.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/pafebejulosek.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fa1389272---84181514373.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/mewomuvupejetefudezona.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609749874bd7d---51940862560.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f43f6a51e---77624424268.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/bd1c6bb44fb249390faf6cd818678539/jetala.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/63764452103.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=cassava+nutrition+facts+pdfPDF 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_off0000cdd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD1 10632 bytes
SHA-256: d458d0c3eae056b3b48f88e3f73724a43a2134463682c4db8b7189ea35a92c4b
font_01_sfnt_off0000e657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE657 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 17428 bytes
SHA-256: 675fc1c6c82b22eca1278d6a511cbf0ac7be8091b9c0d3bbee616ac07e45742a

Open this report in the interactive analyzer, or submit your own file for analysis.