Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2dc130ea343e8b…

MALICIOUS

PDF

95.1 KB Created: 2021-07-28 01:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 12ff7664b47786d62a5de154eeab11f9 SHA-1: bce3547227674d47e0865fc16855d6212e56c345 SHA-256: 5f2dc130ea343e8b05707247d6727deaf0571d6b69dee3bbfebe27d314c0f2e9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many of which point to compromised WordPress sites, suggesting a link farm or phishing lure. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/0e2e3dd71aa4becfa744637103cf0b7e/84306202096.pdf In PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ceggu2u6e2vsm75g9u2nqtdffc/jivalasileru.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/konidurasazizasazipo.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098e304dd1f7---siwixaber.pdfIn PDF document text
    • http://ucity69.com/clients/861769/File/55587436046.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160878bfb92b01---musogilokux.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/wafujakawesere.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/68282640384.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/pqof2o8dlhloc9ke8bf4ee31j4/50671749939.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083808d7018a---gefififunizijimu.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/notelas.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9a801d39abf97270087f51b1ade481ad/mutez.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/3m3sn4t3kq5hb95gt3khlukoc0/27535373593.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/bekigejizituw.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/rebupikakotagupebekorexef.pdfIn PDF document text
    • http://hibertek.com/image/files/20210610_234939.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/tonakitunowenufokuzew.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/01c19c89a40dcf65304ed56815ea0fb8/27795249415.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/tifusiwixozoforobipep.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/2dd74070c3b283080fa31d27aa676096/lolabizam.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/53846163788.pdfIn PDF document text
    • https://fototipia.hu/files/files/tonowupuzuv.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c920e9e7a0---77581655138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ubicacion+clima+flora+y+fauna+de+la+taigaPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA85 11012 bytes
SHA-256: b8b84a878bc039841d3b5b90656773165343718936c2b600c8d75a1a79092d0a
font_01_sfnt_off000103e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 2064 bytes
SHA-256: 5221cc56e96b657ff7c15f49bf1fbf1b5222e15cd7ffd769ce953162a3e53832
font_02_sfnt_off00010d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D20 16684 bytes
SHA-256: 5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d
font_03_sfnt_off000124b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B9 18376 bytes
SHA-256: cc1840c1b68beeff75d4eca939e19465a98f8f0c670dabab116c9ef7506bdf61
font_04_sfnt_off00015351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15351 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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