Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1b01525bd61928…

MALICIOUS

PDF

86.5 KB Created: 2021-07-01 23:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 796d718ea465646922759716307f60ab SHA-1: 9e389b07e46496dfa70ac20fba5dd9304d0105b6 SHA-256: 9d1b01525bd61928cf4f75458479b4d0be5e9466151020b332c96d7276e341dd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious, exhibiting characteristics of a credential phishing lure. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting an attempt to distribute malicious content or harvest credentials. The presence of MFA/one-time-code harvesting lures indicates a sophisticated phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://synerhu.ru/uplcv?utm_term=mesopotamia+is+now+what+country
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879c8f4e609---19988061085.pdf
    • http://scbczy.cn/up_files/file/20210622_174758.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cedd5342b---guwinudabologo.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62ef9e2d1b---barabeno.pdf
    • https://angkalaris.com/contents//files/tufononaguwapusifar.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088b15072b3b---lubodadopubabegidiwexoseb.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608854a492e18---darimitonufubudobuvejosez.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/0f29750be2b8883fbb8682932ba00def/roxudanuvoxuliwe.pdf
    • http://dzbnf.com/upload/file///75899021847.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/a1e09df442795754387890938263205b/mujuxumiwunutusanijoxiba.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606f424146a8c---15745275547.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/povb04bk4g4hvhfso249r6l1k4/77896600724.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/64efj530n6f4059pt75vbucgr8/76468071894.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ae386b14c1b---fedamir.pdf
    • http://constantemail.com/userfiles/file/162375871076878849181.pdf
    • http://animalscipublisher.com/files/upfiles/file/piwesil.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/59f3553ed604db9b5f6dc72c860b9808/lutaxuwokigiwijiba.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a03ae908791---vizuxiburodizax.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e269ab7a2d---kuketabexega.pdf
    • https://corpusbg.com/files/fck/file/1546277233.pdf
    • http://exosportsante.fr/ckfinder/userfiles/files/sapokorivuzukulajemis.pdf
    • http://jnnycc.org/userfiles/file/wimej.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fe634cf02---50506278966.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/bdd2jqn62ufeqfbduudfhs10e0/89585767265.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1e.bin
c96d7ab7eadb9e2fbca314de6037e566385bcbfff6cf131d62c54bba3d5e8945		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1E 18164 bytes
font_01_sfnt_off00011b5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5B 16792 bytes
font_02_sfnt_off00013372.bin
46201eb84364f5dff6431fe09540ac25c81b6f06d119103bc7673a80880a20c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13372 10888 bytes

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