Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4f6151a152b488…

MALICIOUS

PDF

84.3 KB Created: 2021-08-20 11:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 008a0528a0eccc96d965a736effe8716 SHA-1: e3d44acc377e1974b706fa230da42fa82bb1e9f7 SHA-256: aa4f6151a152b48878fa2d22df6b9fa2b3fc2d38d469e7c5202db3182f081147
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, indicating malicious intent. It contains numerous external links, many of which point to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The document body is unreadable, but the presence of multiple links on potentially compromised hosting points to an attack pattern focused on directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8a531c08a---xusoleve.pdf In PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/b2f920df1114bff6955c3039d1735955/22362673375.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/64954841288.pdfIn PDF document text
    • https://tckontrola.hr/files/gawerimumizoludotesilitoz.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c507d4b07df---ribewesidolul.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/4b2a8c0f5654f1cc776a37bca6b95d3c/vixunovur.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/zuvututodibakukibuvunujen.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/5d9d2ab80a149780fa120de31f8bf27e/29419715598.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da6247c3d4b---32219850923.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/eec5e1f8d01877b0e354b78afaa998f1/junarobaduvuzanizilir.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/096e5b52ff026c1f7db21ccbcd136f7a/45954654765.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a445f135c58---88153151887.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/derinezojuzerakoxo.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/38439313030.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/c1a04fc4c259e44dd1ecfbd976919878/5613899979.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75764140528.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3c57abcb13b3fff862d443f1f2b76a9a/wowaxoralebosazuboki.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/7t9fp7jp9t83tk202ucbafo3ve/vunakirokanirel.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f148b9b5695a61c8bace816266f4732c/vuwudogozuvasa.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/77794418710.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/188d94234e7054ceafdcdc2252e275f8/jijumo.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b38643b482---nisikusosowe.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/suzidupodu.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/51854916975.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7f01d3e21---xirobewekukekofunibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=ethos+pathos+logos+quiz+with+answers+pdfPDF 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_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 17824 bytes
SHA-256: 7f77d290d0bac37b045c9ae32d39ce998506d12aecd5a6e578b568070fcd8f28
font_01_sfnt_off000110a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BC 11152 bytes
SHA-256: 7c067f7a485be5d1d7e5bd219f9248d62193c111d3e4ae922fd5185f8786ffb7

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