Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc12648384a541b…

MALICIOUS

PDF

73.5 KB Created: 2021-09-01 14:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e94dbbb5945517192824201647d1dd3c SHA-1: e93d05449dfc07826b9fd0f6072355020fdf3611 SHA-256: 3bc12648384a541ba3af605d302131681c8af672cb674202bdde5f43ff2a4776
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on disposable hosting, suggesting an attempt to manipulate search engine results or direct users to malicious content. The embedded JavaScript likely facilitates the redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161150717bfbb0---28714278735.pdf In PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b54f65cb611---wofidafesu.pdfIn PDF document text
    • http://phsclassof1970.com/clients/875774/File/kebevipa.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/7273691314.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/turigizuvi.pdfIn PDF document text
    • http://skomi.ru/img/files/file/dijidaxu.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/bivuratenonasukoninegara.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/kusadagi.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/93488159984.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160fa7e41a6731---tedutuwezotuluvosopud.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f17ace9154---betaxulesevugokalesapo.pdfIn PDF document text
    • http://caigeshi.com/uploadfile/file/2021052723374973499.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/207467642360bb74c85dded.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/xulixeruloj.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/61295762404.pdfIn PDF document text
    • https://seikai.jp/free_images/files/biwiguwozomej.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/sewedalasobeni.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/bipipotikavoleseso.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2d8f153cf---gilebamutubaxupomegemu.pdfIn PDF document text
    • https://trotusgrup.ro/ckfinder/userfiles/files/wutamix.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/6561576843.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/0fc5faf8b660a5489d8178a6b9d67bfe/71973019764.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/58f2so88lc5ib92a0otp32uh6n/22107363532.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/79170706641.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bb52ad8e5cc---44023698665.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=order+for+avengers+moviesPDF 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_off0000bf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7E 10644 bytes
SHA-256: a460bcbae0849f80e57d85e3efdfb65178df32e6c26024482122dd111872243e
font_01_sfnt_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 15736 bytes
SHA-256: f079512d8ce86bae3ce06c65e647a054c64362d4f1365484fe0b94a1711c4885

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