Malicious PDF — malware analysis report

Static analysis result for SHA-256 268f46caec5689c9…

MALICIOUS

PDF

75.2 KB Created: 2021-09-07 15:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8863864846f20c7b997be72f4a859ca1 SHA-1: 2f860fdae71c5952554dcc89a51d2dcdb38c7f8f SHA-256: 268f46caec5689c977084d14f878f9c96436911ac07e3c4e676b0c424c62e1ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of external URIs and the nature of the heuristics indicate the file is likely intended to redirect users to malicious websites for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=mantel+clock+repair+manual+pdf PDF link annotation
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/o977j30gfe2qe0q8ighgrlipmj/gebebibovafizemis.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98361e7038---45832431819.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/b8670be939ca873e07cce1007b30c1cb/petomevunos.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/1b285c3e0b969b72956d9ebc1977c8bf/xuzunibopirufetere.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/fanike.pdfIn PDF document text
    • http://centronegozi.com/public/tiwamegowenip.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/3081405878cd8b49b479c414a1c97bb2/1344351256.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/bi4fbsnacfctik5rp12u1bpbkl/pojurimulurumifukovinik.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607da72815a1c---58932808171.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/sudenaxofivunijerobo.pdfIn PDF document text
    • https://agermag.ro/mm/file/85873645902.pdfIn PDF document text
    • https://stopserv.ru/files/file/sexesufodamesabasuk.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/pajukiliti.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/76980971653.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/aa4e851714a2c02075d588ce2bbf4b2a/24465056849.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084f97626e83---zepojoxepubagam.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/subarolewuf.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/68749940012.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/jujeritadiravi.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1609414e8aacc7---tevajajiditodajejavo.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/54210585444.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/47924543362.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/81400346616.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_off0000c3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B2 10800 bytes
SHA-256: 0ab4e407ecafd3936277d58cbb67406cda3220f1b880587ccbc0c2935c808156
font_01_sfnt_off0000dc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC88 16788 bytes
SHA-256: 36ce510da1321998689a9ca44814687df9022dd40c7b034bb5fc37975404deba
font_02_sfnt_off0001071d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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