Malicious PDF — malware analysis report

Static analysis result for SHA-256 96cdbe9a7ef274ec…

MALICIOUS

PDF

77.2 KB Created: 2021-09-05 16:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: aad97bdb8c6df4a3389ff9469b64d123 SHA-1: 5932b8caaf145460af5ae8619ad33c4a9f9ec574 SHA-256: 96cdbe9a7ef274ec6b353735ad3b237b79ea98cd43a157ba155697a865622170
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca9433341a4---69464724446.pdf In PDF document text
    • http://anthonyvienna.com/sites/default/files/file/65108225242.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/16456645617.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021073016561280554.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/dc7c05119da387dfa2b16d0401176b63/55477679643.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/31f03cdbe42d047c8494f6ed0ff57649/25152406477.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/gutaja.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609c01bd65121---29058825538.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/64dfa051711baa6d5fccf37c90fbdb4f/wobodadurugapevu.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/32804960371.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c93279358---dafenatutumuk.pdfIn PDF document text
    • http://usateatop.com/_upload/files/97747912713.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/56974529483.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/68669768201.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/j2um02t2oogdpo6jguk6g7pm42/darutafosud.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160769740f41c7---fufemadesum.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f487085c51---73923017720.pdfIn PDF document text
    • http://askort.pl/Upload/file/86708437301.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b601d4e05ce---tolilej.pdfIn PDF document text
    • http://abpaluso.com/upload/file/43719099650.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/9364498668.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/9c0311975b7a98f2046a8f0527241363/10278604959.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/161008658dac61---texutasun.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/luwomipusi.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/toraxetula.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/wudulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=the+art+of+living+epictetus+pdf+free+downloadPDF 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_off0000c6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D0 17412 bytes
SHA-256: b152076ace6cc7633a22b723b8a6b47f04f5793b20e596806a0abf026dfc62fc
font_01_sfnt_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 11112 bytes
SHA-256: d2d6dd59cf57f39252e39cbaebd462b3edbfcc1102c18e095110634d98f4d4ce
font_02_sfnt_off00010de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1