Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ca3052f08e60bd…

MALICIOUS

PDF

81.1 KB Created: 2021-09-05 06:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dec8bebea9f2832e8e640115c670da6e SHA-1: 3af08a7766953efbba2348d5ce4a0fa8dcbc858a SHA-256: 75ca3052f08e60bdcfbcff1907ebf5d6d2513d38ca348ff662aa7733768cec0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.lloydsunder30s.com/ckfinder/userfiles/files/719973871.pdf In PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/l3vtji489ps7lfqmnp5m2m21kh/mugazufitorabajulixuve.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16117350c2399b---nuzudiduxideburedi.pdfIn PDF document text
    • https://anaksemut.com/contents//files/60007346318.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5e292d0d8---wapixerarob.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/tofikuvoga.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/bufozamirarunusu.pdfIn PDF document text
    • http://newmob.it/userfiles/files/lemolibazafixud.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/lexelu.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/kodiredusokuxo.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/bejupa.pdfIn PDF document text
    • http://candientuvibra.com/images/file/fujidu.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/keriji.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119618537a49---44866548518.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609565aa67c41---kezeletolakuf.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/ridaxilakosesawifuvuse.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/75216780564.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/4edf420019518ddd2230e5c32662ccbd/40906696067.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e78f21f4---zodidozamosemevolojaxunen.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210607151930.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/37326882803.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/jemakesizuzowedig.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16115607b02e13---neralepiru.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/1ebgpvbhkciig1staj6s04tb3k/vojemitiguxoze.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/goseg.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/vogete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=sir+gawain+and+the+green+knight+pdf+broadviewPDF 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_off0000d6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FE 11020 bytes
SHA-256: 207b0b07d5a1df65e38ee80ed59c0589465c09acd9474c79f375080873c4e5f5
font_01_sfnt_off0000f02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02A 17668 bytes
SHA-256: 5721c3d82a84e9d118c04970de840a43bc0077a700f83ec18f4e0a285a957570
font_02_sfnt_off00011dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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