Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5e418491af15da…

MALICIOUS

PDF

85.7 KB Created: 2021-07-25 00:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d7cedde0c7b1a497eb96f6336beaceb7 SHA-1: 27be06596baf1d6f92a06754d97c24e06376e1f2 SHA-256: ec5e418491af15da8cdedf4e13b2ce18e3ce5f95be09af53c8ef79e25236a5bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to obscure the final malicious destination. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://onnetsolution.in/userfiles/file/71140913115.pdf In PDF document text
    • http://maility.pl_adresuserfiles/file/79072219318.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/12fcd1644d5abd378568682ee235008a/rugusiwafure.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/39600bb99a1527ee4024a458a023e952/xuwazolazofonixajesowa.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/beturugediremodezujatixi.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/11202812828.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/30100259315.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/mobadasu.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/xelebibotidu.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/849243e717cd1b93e3653fb2059fc598/99086874255.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/pogoku.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/lomededozonorinoxig.pdfIn PDF document text
    • http://dental1970.com/clients/5/52/52cfbc2c58cc98a1938bca6351e90795/File/doginuvudujazefupogus.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/wupulov.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/h3c2up8i1tj2j3c9ppfid1m5t1/teromaserata.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/85131465740.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc7f471824---78776132958.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3db5a1a64---zogavowurururugodejatu.pdfIn PDF document text
    • http://stevis.cz/files/file/79915214037.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607752845d419---17230137554.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/2423561112.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb883506a9---gekipa.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e4800996f---ridipavipasobafitafutid.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/b7a11b40e1caae57cd6e622b89767f99/65589130770.pdfIn PDF document text
    • http://abc-tel.ru/data/File/sijelibovenenowet.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbc94c2a8a---67246936405.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=imagenes+de+feliz+cumplea%C3%B1os+para+la+madrePDF 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_off0000eaf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 16520 bytes
SHA-256: c43e98818a8e896b2a7498f40833c4d8f5e9a30480809c2a9430b77d535122d2
font_02_sfnt_off00012c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C66 11184 bytes
SHA-256: ad2da9b112a1b0749ffb1c629088d516f5c5e84851b8a48848250aa433bd41d0

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