Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba996342ed72a22…

MALICIOUS

PDF

86.0 KB Created: 2021-07-31 10:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 854fd87d2e011cfdf277384226a5a879 SHA-1: aa110a1cc64def00ef5c497830a9168bd165d07d SHA-256: aba996342ed72a22d03072320467046f08b0ad3545fada74bf8e0075b1a3b13d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nomylo.ru/uplcv?utm_term=what+is+the+most+powerful+thunderstorm PDF link annotation
    • http://watthaistuttgart.de/userfiles/file/lazakokesijugarizuv.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4fecdf055---jidekos.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/viredeni.pdfIn PDF document text
    • http://inse.us/uploads/images//files/sepetujewoxibaxugida.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/dolizugebudiw.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41e685e17c---fefixaxenawopanepilifilov.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/83863045193.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/57169138872.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/zuvamiregiwoj.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/fadavatubojomonal.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/xebajuxitirupe.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///fewaraboxusekipupo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/161045a3138825---mozuxeziwipixadojabof.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/5d7550192fb8ef447984a5d2ca103223/43060235790.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/70801346596.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940fc66ff97---64993744225.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16266370859808.pdfIn PDF document text
    • https://fultoys.com/userfiles/50200742172.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/10777576306.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/26e57641c983a5179f4068c3260671be/panufewudinaw.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982ae2e2037---31175716488.pdfIn PDF document text
    • https://wittnebel.dk/file/33106103085.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/4560666271.pdfIn PDF document text
    • 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_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 10940 bytes
SHA-256: 8986397c01a62bb8da7e961ca8e47f27c842223a708ebbf9f8ffdaa55430e65e
font_02_sfnt_off00011f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8D 16336 bytes
SHA-256: ec663a5344cd55a5545c12855f6a05135cd90e6ddd9fee9538cad3c859ec9967

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