Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c43ce380a19d1a…

MALICIOUS

PDF

86.5 KB Created: 2021-06-09 16:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 801e6d84c9f62ce0c6ed1725d5d76ba6 SHA-1: f5abde13fd9ff310a4ae7fa7ab306db619fe9482 SHA-256: c1c43ce380a19d1ae0760c3e71b86662aee5e0a05e60441b0257905cf5dcbb75
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that are likely intended to redirect users to phishing sites or download further malware. The document body, though heavily obfuscated, contains text related to movie searches, suggesting a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ketchas.ru/uplcv?utm_term=mulan+movies+full+movies+english PDF link annotation
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/814b4f557ea246674e1775d436b81aa3/famozaragabudoridoz.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906b85f1364---julokipax.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace04879987---xogopetomowewusowopu.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b00983dd0d6---zanevatalelumalov.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7758dacd9d---rapufuboxegef.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/f20f21ccf89896eaa6c47c977458bc65/lawifo.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/a80b23a7e692592be7b30cf975af8f29/80837605892.pdfIn PDF document text
    • http://candientuvibra.com/images/file/17263150048.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e9f3111ec75466455245f62d4f4b48c0/sanonariwoviwalozimenogix.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/c862e6f1fb030bd6ac47ab81795559a0/lebejenugewu.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/4acb6b417c7c03e1043f0bc1cfb1b86c/mozilebofe.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/92650761754.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/xivoxa.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/b09b4htdtlgj0ot8dqhpo3h4b7/pakosinebejobakixo.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/dilubemegakexojup.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/xejibavurepiraz.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/66ae6e6364d646d0a4df4e70e645637a/lasazudiwujomunukisesidi.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/71858245058.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 2988 bytes
SHA-256: 041eeefca3f75e8ecb5adfbd6a986841a6be4f48092ea62d8a22fe94c42dad9e
font_01_sfnt_off0000fc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 5152 bytes
SHA-256: 7b1cddaba8fad2d32c388df9ae780b4a6baa3072d55e37334d42ab246271648e
font_02_sfnt_off00010da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA7 11276 bytes
SHA-256: 10d478f8d0336fb6b8acc47a3ea011dea186d6b7edaa7e7dc691115b27e41ea5
font_03_sfnt_off0001340d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340D 16376 bytes
SHA-256: f556fe62800b6536d9c5796a0e8efac527db441eca0bfacfaf1177af023dd607

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