Malicious PDF — malware analysis report

Static analysis result for SHA-256 46fe7b1ed8526843…

MALICIOUS

PDF

88.1 KB Created: 2021-06-28 03:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa118fdb4d9a382b8bbaa58b7d4331a5 SHA-1: 5b6c3e6e90b46eb6e39ad34f213e57aa42459ced SHA-256: 46fe7b1ed85268436c4b732bf90c8af1640d23701996ecae48be2ba30605b101
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress upload directories and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or lead them to further malicious content. The primary attack pattern involves directing users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://nullemont.fr/nullemont/ckfinder/userfiles/files/nazitefawesoki.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c84d0a4aebb---gonufavagewitupob.pdf
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/xeliguvubaninuf.pdf
    • http://misspacificus.com/clients/873634/File/wodekuwule.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d63fe70758---3973217178.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160977eacc14a2---kudusesasewifiz.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb647a3193---seworoxuvelonafo.pdf
    • http://ehoron21.mn/uploads/files/50812795481.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607137c800877---wisodeteseparumel.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1cbb2c483---rezige.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/77bd29b1c99108e7360287022946904a/56878325107.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/fct5fqckotnf1ahnks3ns2n2g3/fiduwebidevudavu.pdf
    • http://whatdwellswithin.com/file/zozodi.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/e6656c6d078acccfab4b6f84b9166632/27900972900.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608abe50834c7---nefesiwamerodet.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949ea19867a---32917850415.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/c9403bb1c8e411291f3ea47139f0c2c1/55988499727.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/d3c59ae3a12f632bb4ca1e078cf7249b/57778484130.pdf
    • https://goodluckfishing.com/ckfinder/userfiles/files/jaxivili.pdf
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/dilotonolapamovimoni.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609911c9868a9---41448510121.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=key+project+deliverables
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f635.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF635 16792 bytes
font_01_sfnt_off00010e4c.bin
4ea5696179dbf8bdeed4f3bfcc0f3c69bfaf68961d004d4e57dc2c514fabee6f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 10844 bytes
font_02_sfnt_off00012737.bin
85480fa8b1e28f94d27eaf0dc8aaa492d9fae7214375f13a4ee13c4a4c002a50
pdf-font-stream PDF embedded font (sfnt) at offset 0x12737 16612 bytes