Malicious PDF — malware analysis report

Static analysis result for SHA-256 326de053d02de826…

MALICIOUS

PDF

118.5 KB Created: 2021-08-09 21:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: eff305b1ba5b49057864e269e116c1be SHA-1: 10aa28265e728760cc9594061322c4aae888cae8 SHA-256: 326de053d02de82685d031803a28d455b3d195fc7246a54ece10f06c93220f26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly indicate an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/44fee224e60404f618f1072fbdd4818f/73817801825.pdf In PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da0ef8ddc36---6807386527.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fb596e878---44559399937.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbedad3bcf---47222190584.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c900001a426---19224080461.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085ba86f0433---sijek.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/razer.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/wabexabu.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cda5128b0e2---46217760535.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093aaef94f2b---34750580865.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/89196501851.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f1b899bb5a9b61eee817eaf772894fad/nejeberujumivojoz.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210616115905.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/gabut.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/6b0c1f1c1dca43403a2dc4f07970ea06/lasoguzu.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ppuv9a2m8i2vcmlb9qf9ckg3mv/20709331119.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be3c7d7c92---debolegawesulazod.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ff3c5ba55---47765362479.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/27675966766.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160c99f120ca9e---34384798326.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/6i88nb7ei442r1j7mtdvlt342c/33513489173.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/49383956015.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/83765921205.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/f6trlat5keb9mhvn16ngl69pch/19014841710.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/40956158904.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=avon+online+brochure+august+2020+pdf+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_off00016d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D54 16424 bytes
SHA-256: 5494e5b998d74f47849f95874f889e827177c9e76f9b78fcb4209bc496e0b484
font_01_sfnt_off0001981a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1981A 11516 bytes
SHA-256: 2532b9b99a1b50ae2ec6d20c88b0fea3bfde713bf28d4c724616db8f55a19e5c
font_02_sfnt_off0001b30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B30C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1