Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fa95ea1f9dbf54…

MALICIOUS

PDF

81.1 KB Created: 2021-09-08 18:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 04df89dc2c93f03c49d3893476f2eea7 SHA-1: f51e380f2ecc23e05b446fead1b80602c1d6536c SHA-256: 26fa95ea1f9dbf54bdc3de74d44089badcf85833bdf97ce9b09eabfe2c324164
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous disposable or compromised hosting domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pelicanfinancialnetwork.com/ckfinder/userfiles/files/97532279810.pdf In PDF document text
    • http://jhdljz.com/userfiles/file/1630684508.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210902_123411.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/21609437723.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/11881471097.pdfIn PDF document text
    • https://noventa.cz/media/files/file/82561379027.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7dae6fcfa---53809478793.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/xawejujatatoxe.pdfIn PDF document text
    • https://norservis.info/files/files/tabojumunipose.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132091da0b31---favipaxujevud.pdfIn PDF document text
    • https://iohrp.org/f_files/files/vewefoxizulupi.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/92866499078.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/47058248995.pdfIn PDF document text
    • https://digireg.at/upload/96525218963.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130d08e3efc2---bupatulaginuxodifo.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16134723fddd15---lokisogegugujesep.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/tarokesiwovo.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/lafuzogovi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613860a9f17d3---21256580688.pdfIn PDF document text
    • https://htcpost.vn/vietpost.vn/img_content/file/20553239823.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135780a86d94---59696886293.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/ripinofamizabufakejebeki.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/sidibebonume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=old+town+road+piano+notes+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_off0000d895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 17452 bytes
SHA-256: 38b72dd8021a1902e1ff920a9c9feb9772631bcce8e69a090f1fe86c3c821105
font_02_sfnt_off00011e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6A 10604 bytes
SHA-256: 3442d69f4c1a0284999eacce8cd8b1134f56b34dd02326da97ef2bea3c0b39cc

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