Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca469cfc012825c5…

MALICIOUS

PDF

91.3 KB Created: 2021-07-01 11:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f0b918bff675664f7d3af0283972061a SHA-1: a079d80052edd9da66b30913830fab5b36876fe3 SHA-256: ca469cfc012825c5afc316fbec8378ef5b3a697b4c4a38f071ff530863a3a51e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a focus on directing users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800a1bb9f4e---47528288684.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/67771366934.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/98d0895dc81f7819f8cc6a1e228f7394/42160735736.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080cda87ee43---10464325584.pdf
    • https://baoholaodong24.com/userfiles/file/33335307420.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/zezojoto.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f02286d95f---mezotujifogurafalexigarip.pdf
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/03767afd61a8c8bd424c85dc8c0addf0/83620743233.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a530e101fe2---zepulazulezoru.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/4d29af7bffb3fef15ca94063486469bd/nepojowusesiti.pdf
    • http://www.ecostroyservis.ru/File/vibukemipezuwowipazexoxak.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1a328c9a4---memifabudofatewekawe.pdf
    • http://bright-inter.com/file_media/file_image/file/284914722.pdf
    • http://arniestribu.com/campannas/file/61124761083.pdf
    • https://zzwgjx.com/d/files/4174477668.pdf
    • https://evergreencans.com/userfiles/file/jekugexejivigazagarakumo.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89e310554a---24371170031.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160956ec3a1313---81006189375.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609490a80dbf0---soganuzuborodanad.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/8db380b705d0fc10c11d23bac6a71cc0/86845251381.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d39d9708f1---zobaduvofalanewonajakipi.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/fe13fef73da9904bf87c111a38f6e5b3/zitopuzaxamegizupogawujo.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094589128486---sudevipipilejimarigegofis.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ascended+weapon+stat+change
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76e.bin
f51e9c4d7e0597223e80448a3cce5fd3873caec1c4f40753265fa7592dac3bd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76E 10620 bytes
font_01_sfnt_off0000ff91.bin
fed45240c1d6893ed71674ddd664581bc8109e2ac9785e692065aadad3346b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF91 17516 bytes
font_02_sfnt_off000119d3.bin
2f9d0ec996990003f1e2aea6b8d810a5f9dca8d268b97a0a240ad7e19731888b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119D3 17224 bytes
font_03_sfnt_off00014730.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14730 16792 bytes

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