Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da258a62db976e4…

MALICIOUS

PDF

73.9 KB Created: 2021-07-16 21:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3706058322b774c8a9a1bd817fca5b3d SHA-1: c374802d9f6e17da7b4c4523df4bde960a38f80a SHA-256: 9da258a62db976e41ac6ba14435310558eb6ad611caaef5a42af8bf38e3f034b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute malicious content or engage in phishing. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/78de260ee2622b9a4611893662be9a32/fevalixiwipuromurolupevep.pdf In PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/264e85d9c241e6bc1c3d6bca09b9226b/dibasude.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a93f2c83207---97315517746.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/67707881414.pdfIn PDF document text
    • http://hilltoplancers1975.com/clients/13753/File/67816606054.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f09c40b00cf---23460361770.pdfIn PDF document text
    • https://notrepanierbio.ch/userfiles/file/39156769371.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/69535416074.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afef548c72---xujagenebijovag.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/gcf4i5r9oajjm03bk9su8c0860/79975384804.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/fa5b1a56fd3ca75f5c849f8efabad889/91676858185.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc9613e639---76189383822.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/18253976083.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/niwoxo.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f0fef379b52---77908498835.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160947159a4b68---66202903287.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/22569486883.pdfIn PDF document text
    • http://merwepizza.com/upload/file/wuganovuv.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/76231937626.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/fba7ae63ae2530bbe82cf26676576e07/turibem.pdfIn PDF document text
    • http://praguetransfer.com/files/file/witegibuxim.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/836bba9b9f46e5d26b947df41b46b2fc/36119985355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=punctuating+appositives+worksheetPDF 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_off0000c031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC031 10952 bytes
SHA-256: ff3567352fbec468a6cbcb2629dc1f21d34208c68bbbb4d3ff7504b37faac900
font_01_sfnt_off0000d9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C1 15852 bytes
SHA-256: e4263b057273eda31ef64d6c9abaeedbedef459a3dac14350cfd60bcfcfbc2b3

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