Malicious PDF — malware analysis report

Static analysis result for SHA-256 6866abb7140ec3a9…

MALICIOUS

PDF

81.2 KB Created: 2021-06-26 13:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92cd744a7031aa3886f477671606609a SHA-1: 24d75878f6e0108d2b6190b68e3b994d43a70eec SHA-256: 6866abb7140ec3a98bea5dfe6636eae017eecc53243bd3a9e6a8748df32a0b8b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/1048b0f86c02f604c57c43b0476a3938/fatimuzawaw.pdf In PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d1b2b5f35---47628528345.pdfIn PDF document text
    • https://aquatim.ro/uploads/files/xigafi.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/v2m5j6u9i4uqs3fmspdnu413qb/zolosafopusinirema.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/nevexijebofimoderokilonu.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/3ddd00ff01810242e62078e38c503597/25915341145.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/seriludapir.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b463e8725ad---86910892370.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/b20da8f0c9b6b1aa020380b573873341/bugorisapovezorimo.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/864118e51c00149e948ae8dff0992e18/63071743119.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/19990389232.pdfIn PDF document text
    • http://amandamaitland.com/images/file/75439429994.pdfIn PDF document text
    • https://t2sc.me/userfiles/vujibuzamimila.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210621_85126675476B2961.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/pugozowapenemerozan.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/16968884193.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881eeeabd24---fuzokitidutojitow.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c6917904a4c---32537481300.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/7c375fb29214e191d99722d6bb6635ca/kabat.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088534edc25d---nebozumipebebarumo.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089c643bafb0---zarubusavuvuguxavuvizuso.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9403cc8ace---supepazel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=action+research+in+mathematics+problem+solving+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_off0000d981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD981 11252 bytes
SHA-256: 197cb4d5d1b960a681fe9c2fdbc6e4cf520eb7978c1c2691880b84edaad8ef2e
font_01_sfnt_off0000f34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34C 16928 bytes
SHA-256: 30396f714f08b153284a60fc6e996f658e6ee7a78892913969e8e62fcbcc8c9b
font_02_sfnt_off00011f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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