Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c9020d46a68f93…

MALICIOUS

PDF

87.0 KB Created: 2021-07-03 11:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2b3d4e23993f5c53baf7470161203b00 SHA-1: f5648a3d1440e2e4aa2a909305c313a7fac63950 SHA-256: b3c9020d46a68f933c332bcd97aee2d4c834b845da5c196cb2c37a3c70f1744e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to host malicious content. The presence of embedded URLs and the ML classifier's high confidence score suggest an intent to redirect users to malicious sites for further exploitation or payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=how+to+save+only+one+page+of+a+pdf+mac PDF link annotation
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762b9038d45---62401891134.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1d77c7e74---96391287890.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16083906cafa5c---43028149047.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/nixet.pdfIn PDF document text
    • http://attlas.center/userfiles/file/62709667555.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/3c91c0438e9c1191fa319158b7f97606/sepuwudumanewelafuvowus.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/7cd337aa2149adbbddbd519ce90ade17/41057637777.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-14/20210514014733355029.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/b129a67fedeadcf4af74784fc6609c6b/xirabuf.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b6f73e7d133d72805a89879c1d45c0f8/10339204777.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/dirabe.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/wumokubu.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/dd40d9c52e5567b55a77cc39b468ee16/15901311276.pdfIn PDF document text
    • https://bczenekar.hu/files/file/41131613405.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29e1fda990---kokazalupunomolirix.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/vcmr0oq0fdkfpau9i8acktcc8p/82885651590.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a855468a173---fagisukumozogotisususal.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/7b641e05d5617c73f4c80376a3b0d440/lutiminan.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/1bsgb23bponj2r2985des11j82/40677918395.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/00477f259a8d2e2f0356c713938b7641/3138497960.pdfIn PDF document text
    • http://dalaichau.com/files/kodiwofadisojikorilowoga.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074542a758e9---52373239168.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/miraxinufas.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/vugilezofamewat.pdfIn PDF document text
    • 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_off0000ed0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0E 18284 bytes
SHA-256: f665381c66fc8c5d3be2d65824808f7968eecc81493efdd73f2a2fcea8d719a2
font_01_sfnt_off00011d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1A 11028 bytes
SHA-256: 322c3ea4a00136672f0676033045562c94571828d70c10c78b65718cf49594e7
font_02_sfnt_off000136a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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