Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e42c2776d22f413…

MALICIOUS

PDF

96.0 KB Created: 2021-08-14 12:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 48627f6f5a10d98fa86aa33714e180f0 SHA-1: 74f127d6a37aac51f31c18a242bdd0b1724f7a37 SHA-256: 3e42c2776d22f413e5cb581e8b25646ff3778fd696bac71cf6bbaa8d07aa2f2a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of URLs pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • 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://volvo-cars.jp/js/upload/files/37960669668.pdf In PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610945bac816e---54189639943.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/89433911935.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/xudiratas.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/24212074118.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/sanopumam.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/sexomefifukojixenigakid.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/1baa4376b468a67e812c9f9766bda86a/14800031317.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/nokapuzoxadisibesokebiga.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/39936205922.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/54041214612.pdfIn PDF document text
    • https://saporidelletnastore.it/file/nanajulofefubisu.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/49536807500.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f3f96f47274---wusotizetefaruvubaxubuj.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/bqkgg8faidberocfuejkr32mv1/96913128824.pdfIn PDF document text
    • https://tonitomov.com/picture/file/27229389990.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/vevapanu.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/xizutikirenutega.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/dubazelitime.pdfIn PDF document text
    • http://soupworld.de/upload/file/xelunilozobuxonipo.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/59239341662.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/47454411371.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/5931631614.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607718c86ead2---72106008456.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/1a004c8756ca82049230f89ada724615/moxedorekan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+create+an+effective+sales+compensation+planPDF 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_off00011318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11318 10784 bytes
SHA-256: 5cdcae8cb058a789a536cf099a89925c23af08894b4e7beb29d67b07c53fa6e8
font_01_sfnt_off00012bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14405 17744 bytes
SHA-256: 770c2c46900f342ce18d285ca6ceef781a65c51aa90ac31befdb9f4fcc24e39c