Malicious PDF — malware analysis report

Static analysis result for SHA-256 8986674a3af2701e…

MALICIOUS

PDF

85.6 KB Created: 2021-07-02 07:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 093240598e5b940d68e56dd5651f7053 SHA-1: fb4d1f7aab396d5b9be46b0ba56e2f4e69f4cb78 SHA-256: 8986674a3af2701e572aa750336c6bea3bbf2cfbf6876ecfc5ccdc0bba571e8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF contains a large number of external links, many of which point to compromised CMS upload directories, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://licorne-hotel-restaurant.com/userfiles/file/kipogolelu.pdf In PDF document text
    • http://scro.ru/pic/file/39788453183.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210629_E63BBD27C39EBD78.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/96578779610.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609adbe9ca135---40533125030.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/69fcab43960e835e30a40809e90f5a97/nowobozibusifasapekakumi.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/xarudum.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/gafexodituzat.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/65512569719.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/liql9r9n4dcckkj53vrkgt5o8i/18053088958.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/sewefuniwoveguxazaziwalu.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/edb8db24c22b8e47cc4bee6052f06db1/zomuwo.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609579650af3e---73663486768.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f438d72eea---zonaxuvenez.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8af302bca7---58746143102.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/kuwuzuponixoromubiro.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/53fkgp8l72br1tp9u9uu1n0io7/67487673480.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160834bbd629e5---54592916867.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/sagiz.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/21710850550.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d43e5616b1---41033163184.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/37037072909.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/2095598693.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=master+production+schedule+templatePDF 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_off0000eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0E 10872 bytes
SHA-256: 9a8254fba48ed122a0f68295f81e353428511268e31a68b6bdda0d01b962c2fa
font_01_sfnt_off000103ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 17264 bytes
SHA-256: 622ec10077749aa0a1f90306c4daf49d15fd2f5fb28ae4ae942c8a717a35f563
font_02_sfnt_off00013123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13123 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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