Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6383ba2d2cab8e…

MALICIOUS

PDF

80.0 KB Created: 2021-08-20 13:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: a0434768fc644fe44f520f147833f451 SHA-1: 76b46d0282a288b0024311feaf806451a6c6cb17 SHA-256: 6d6383ba2d2cab8efa33301d60ca025ae9a3816b26ad3a102c65c052195c9a4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://laborke.ru/uplcv?utm_term=difference+between+alternate+angles+and+corresponding+angles PDF link annotation
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbdc39482c---73384132410.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/miluw.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/ef0560375ec96c8d1cb96ab7b7e677e5/titiku.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bab402f832---napab.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/jumozemuvujipagenusivitem.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa56f60079---sobewisigu.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/bifegaxopuzejajazufele.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/97016002731.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a64e735017697cc3acb7030f9731db59/bejivutimativaro.pdfIn PDF document text
    • https://avflash.nl/upload/files/30037586977.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161163f76b9b3a---57089961933.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/pixadumejisowibosul.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/fukupapisa.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/pj7slj76klmrru6utge9qj06s1/73773779422.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16226579172731.pdfIn PDF document text
    • http://llux.vn/uploads/files/luwukegizudotinaletuko.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/sisexojutev.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4c9f04586---bejateleme.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/c750f3ad8fab59bcc2396b295df2e88c/49319444628.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/22ad62088569caf8b5c6cbf7e127a045/vifagel.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/47129949525.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/mofanimorebimu.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/70037862906.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1627747077.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_off0000d34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34C 17160 bytes
SHA-256: b50cd560cefb6381d5dce2a0a8bc1b92fc5ed1563c8d2dec1aa12b70ba53c861
font_01_sfnt_off00010073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 11020 bytes
SHA-256: ddb3046602de2013e37b845589462cbc9344a748245b9f8559c1672b558915a6
font_02_sfnt_off000119e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.