Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb61fe7fdad7a3fc…

MALICIOUS

PDF

112.7 KB Created: 2021-08-10 00:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b4898363f66a987903935f88733e735a SHA-1: 274ab458aaf5efcea44c160c58ac2e37d6381e08 SHA-256: eb61fe7fdad7a3fc20e866b1c2c597fa4ea13fd564ac10cf175e2029d482e4f2
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/eu9mb8ql8em087u9q76m8vst94/63907573365.pdf In PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609bee01ad82a---35618880803.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072e1ff47b10---jipiri.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16072efc756946---36268564338.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/viwutesota.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/b3ed67d2e5be54e6dfc4dff807afa606/49811702666.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/nimedalebile.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/24099076528.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/21545321611.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2918f1e49e---rejorafirufufewujijamobo.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076fb1665a3e---5247031843.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/nigaruximuxafisuvisij.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/79008366329.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833c821c00b---nigusopadebenebivel.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3889a650b2---65860788462.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e126105c345a534ead184282194aefb2/torazamogelasaju.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba89d9ebd09---bivewo.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/68644268670.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/9nmbhvejfucp7h2b3cb8335rc3/81384174335.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b291e79fec4---65165769228.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/sudanigeruj.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f98193b85---bexorizijamijoxixekulux.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/bizula.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/dozipajutogegaru.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b776b3aef84---43198742960.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=madden+08+xbox+360+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_off00015522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15522 10776 bytes
SHA-256: 713c882475d516c804e23110bb0d66f38d2fca3f8811ebe077f0acc874115059
font_01_sfnt_off00016e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E19 18116 bytes
SHA-256: 903b4ca73b5f86227a2d07b0db8515e4654129e09141f431af0aaee8f97be450
font_02_sfnt_off00019d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1