Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af7b260d87bbfbd…

MALICIOUS

PDF

79.8 KB Created: 2021-08-28 11:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 66a2ea0fef2e6dc301ac570f4a0acf58 SHA-1: afbc2cf2736766e2bfcc8a69748401a1d6b38c48 SHA-256: 2af7b260d87bbfbd8d559ea153b43e985edf6e057b595362a4b4ad9a9c98751f
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document attempts to trick the user into installing malicious software by masquerading as a necessary update or plugin. Several URLs point to compromised CMS uploads and link farms, likely serving as download locations for further payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/p4n7310scht9cm8gr5s1fo0dj1/bisivuwisalokexuzilina.pdf In PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/96774640013.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/eco0iqe620c125648lj6b0vk69/4193779230.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b37833bf6---lerebulujowawapubusogume.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16097a7c93f77a---81149264790.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5616a41ede9c6bd2297fb3bae5137208/zopevizige.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e70625d24---dogizaxezab.pdfIn PDF document text
    • https://j-kowalewski.pl/uploads/userfiles/files/80992025679.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b3973603c6---supigusesejofazaterofu.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbea47eae1---52443098170.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4c9259779---karafirokitegudigeb.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162509041037.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/46999489623.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/sudiziwusox.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/nomexoxu.pdfIn PDF document text
    • http://kidneytexas.org/clients/861060/File/forakuzedusegidaparom.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/47129096114.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160acd5ca5addc---36991451900.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/80191706362.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/topezolopopu.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/silesatafam.pdfIn PDF document text
    • http://falerisztika.hu/tmp/gatenika.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084aa4355f7b---baxilasopebakusogasisi.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/50697787143.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/75c8ca71a4541d540359c6cbe5a608a9/sigirarelabosojakuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+draw+border+in+wordPDF 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_off0000d630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD630 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 17032 bytes
SHA-256: 8d75015654b0e1fe40535b000e329c7e4f3d44d27913070d6924fd72f202d5dd
font_02_sfnt_off00011a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A15 10244 bytes
SHA-256: d8359fd98f1e46635647e6fd9cb98338e17e7db2dfab60343349a4ea3e26bf76

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