Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69295379ce76a37…

MALICIOUS

PDF

82.3 KB Created: 2021-09-03 06:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 26b999697a3e295c16ab991f4f10a229 SHA-1: a4aec2eceaa2dc3bcc2aff15f18200cad6e3f57f SHA-256: b69295379ce76a37e4c4bce5df396209f3806819cfa57bfff3fd4d84139bd917
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress sites, suggesting it's designed to redirect users to potentially harmful content. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support a phishing or malware distribution attack pattern.

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 http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094743355137---xidijamezujidafegom.pdf In PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/f5ddf652e8ce8455ba9c790ebc9cc5a9/43082788629.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b86a94e9c4---12208445614.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/dowopuk.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ugs3hb9065glk0n52hmkkp0sp6/libonajulobemibenexevu.pdfIn PDF document text
    • http://ore-processing.ru/d/files/4427962559.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ec7a8b0d2---1620718621.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/lilor.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/680a73e4a16e93d4d151c8c9c96d94f5/32525237678.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/80354302281.pdfIn PDF document text
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/43152430680.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/6it9eujephqjcla30ncr0l5il7/48489524024.pdfIn PDF document text
    • http://furniture83.com/upload/files/nofotomeb.pdfIn PDF document text
    • https://centrumschoolka.pl/photos/file/vinizura.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/78007272945.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607781683396c---gukizenaj.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/gifuzutepadeximewodad.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c162d0710---3945144533.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/15298827628.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/c44c56bb12dc2ca7dc280a5d87c41c5a/57410469266.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/adaed4c5c567b1816a1cb6317d54dbac/vuvenorevuzawuti.pdfIn PDF document text
    • https://intersat.lv/files/file/14946835027.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/sopibelofa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=franz+kafka+brexit+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_off0000dba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BA 10528 bytes
SHA-256: a02326e199186519a67bc3a961d8fb146d8e09b05eb92df8a48dd00846a483d4
font_02_sfnt_off00010ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA0 18492 bytes
SHA-256: d8449c4698f821c4fd9b577e6eeafbe179e405fa22331a4b90201eebe5cb612e

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