Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2447d3eb4107453…

MALICIOUS

PDF

92.5 KB Created: 2021-07-26 01:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: afe4bfbef20ce9cab21d6db99bfd4b97 SHA-1: 6d4873e6cea7c8fae49a86d7d169543fc30f8662 SHA-256: d2447d3eb4107453c1bce7f8563cbb629fd886663edd7930627196a5beb3580e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and a link farm pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The presence of embedded JavaScript and a high ML classifier score, combined with ClamAV detection as Pdf.Phishing.Trojan, strongly suggests malicious intent. The primary goal appears to be redirecting users through these links, likely to a phishing page or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/sebugelabemagemeje.pdf In PDF document text
    • https://isleo.com/i_photos/file/dopipojozurev.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/31a7fe1bd98a8b21f4b7c0d244ea482f/dozedi.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6c5022033---gojaperexazufafeliwopu.pdfIn PDF document text
    • https://guijek.com/userfiles/file/zipudopatesevanepogumidul.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca1a8796dfc---wevatezawifofulajigatu.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/83361481296.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609747c4563eb---62254901661.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ce0a745c1---goposufasukofikiline.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/b0nagpasp04pp9eib9b3kvtf2f/24679930665.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607d6bbd0d38f---20815007021.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9585771df---32054208047.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/36885134540.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608df1dcddc09---72256379978.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cdec2e00f84---44559627994.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/nj0lqjnp9pit2ojmfvl08ght5m/tapofovevedefumuse.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///61988338841.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/lenor.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e23525db6---fenipakod.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/30174687850.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a019b3d9335---kofarudidafa.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/v27i1hdho866mq8qt5kq3681oa/visesulakuniraperut.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/d7368aed9c50e4c0a8619e69b9768c93/demamibodiwasatejulin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=tekken+6+pc+download+2020+freePDF 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_off00010698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 16880 bytes
SHA-256: d153d298687928403757ae474871c2c102b1b880e351f1e479f8d8214af066bf
font_01_sfnt_off00013260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13260 10808 bytes
SHA-256: 61d06840e580e200177ae9fe4595c3368bb4c558a30b5160de6da9a8833cb64f
font_02_sfnt_off00014b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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