Malicious PDF — malware analysis report

Static analysis result for SHA-256 090d748837c0448e…

MALICIOUS

PDF

88.1 KB Created: 2021-09-07 20:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f566956f34c088561208d0f46c2bc78c SHA-1: 2bb1bd2e55fb6618bdb65de539a50d6c7b8c946c SHA-256: 090d748837c0448eb5d55824b97dd1b3a13a5fb7ff9209044acfb56fdf8102b3
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 a link farm with numerous URLs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a likely phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://nomylo.ru/uplcv?utm_term=educational+leadership+in+the+philippines+pdf PDF link annotation
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7eefbc468---38640104539.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/8ql9jsn02d1qljur4jl2f5kbis/10083900202.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/98289628768.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c9717ce0b---42868390796.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/733def0909b6b272ad641bc579bb386f/33686325909.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/fogatepedomezekexezaw.pdfIn PDF document text
    • http://wych123.com/upload/files/luxoforanero.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/22124ebba795b4768fff0da0a173a1af/kubiworulorogatije.pdfIn PDF document text
    • http://industra.sk/userfiles/file/9949384008.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/lawunoramomima.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764a8c791ec---62353128157.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/b78457bee08093fe2e3970ba03491465/vilowoputuredux.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/01c6f3e20305dc2628e9f9c4bf7ba5d8/45237200470.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210716142237.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///91960782756.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/furijibibewe.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/8507377735.pdfIn PDF document text
    • https://ghnservizi.com/file/lazuzal.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4cc871dfd0c4cd21db68c0e77d85f745/80867493791.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083b3303416b---39815456766.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/32543791219.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/16855489303.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/6gc6almfuqnrchi6gfgaq5qm46/mewememitulitujuzo.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_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 18536 bytes
SHA-256: f7316aea682c63b3e85258dfd9c4cc74199103d2087730a63aaac38e4132bfc7
font_01_sfnt_off000121d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E7 10800 bytes
SHA-256: 3e70c56e76bf4f9863cdecd27997a44ebf8fc6b1ac570bdf1b09456babd3cc18

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