Malicious PDF — malware analysis report

Static analysis result for SHA-256 0306f7313d4121a7…

MALICIOUS

PDF

87.3 KB Created: 2021-09-04 14:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c4a7f701ecf0fce660b43ef642791e82 SHA-1: b8aa7bacec2754fb9bd017ca9bc7dce32c67c8f7 SHA-256: 0306f7313d4121a70888d398cc64f24b8dc7c5feaa281e295bdbefef24860ede
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to numerous domains, many of which are associated with compromised CMS uploads or disposable hosting. These links likely lead to phishing pages or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://aiwatopup.com/ckfinder/userfiles/files/94075232680.pdf In PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/9ca399d49e7b94aec06973e7a33a3a9f/29628629767.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe97b8025a---simurigewo.pdfIn PDF document text
    • http://goodslib.com/userfiles/files/sopaxobo.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/95815178698.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161105bfdcd341---musumiwopenosoni.pdfIn PDF document text
    • http://msiutilities.biz/documents/jomunuxijivarexotili.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/92656609775.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbefbc208ce---nexirexavewibenitifefe.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee15fe7f63---22275292082.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608450bc17ff6---riwebav.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/nusal.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612cdb3a77db1---80012531044.pdfIn PDF document text
    • https://subarini.ro/mm/file/84172670616.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/womepepopawetu.pdfIn PDF document text
    • http://cloverdiamond.com/file/6067951202.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161088db15aea5---riradomasegovu.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/22719981060.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/13499621125.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/7332600129.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdebd70f595---kegelupadegofagev.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/lijelesesakonetukodedozok.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/bc0af4f1cb9af0b6565354d62a118941/refinefinikuwirosir.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/jasinuzamazoxedixure.pdfIn PDF document text
    • https://airbays.com/userfiles/file/97890120627.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/96570195246.pdfIn PDF document text
    • https://eurocomm-italia.com/file/38495121770.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=civic+2010+lxs+manual+fipePDF 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_off0000ea6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 19636 bytes
SHA-256: 80c079bfa31b64fe16f5e898c478ad4d3498ae325f489107064eea58d546d06f
font_01_sfnt_off00011e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E30 10916 bytes
SHA-256: 423eae54589e14db5a37674882d2a080690da79f506c36cdf98cc0b0f56e0a81
font_02_sfnt_off000137a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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