Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ef80a3b30dd829…

MALICIOUS

PDF

84.7 KB Created: 2021-08-17 11:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 19fc7bf07ac67598737e7f8dde43d300 SHA-1: 25e62bdbe051d20902f40c0509d71684b641f586 SHA-256: 02ef80a3b30dd829fd9facfbbf084f4512af04b8a927fff58a87cbeab1e9e8f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the extensive use of external URLs is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pistant.ru/uplcv?utm_term=how+to+increase+height+after+18+girl PDF link annotation
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d81c61f186---wegoganerenewejaro.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/13768572327.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/disomibopakozigede.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/kudefekewogilabuledor.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dce6e03638---1650119988.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/ludinabibaxexomopisu.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8d57a0719---43588604717.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74bb5bebfd---piwiwabupowewupoloxoneki.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/gfrb88ck3aggj16qsdkdrgr856/22816887025.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/467746e89bb4ceabd17fc6b2a665d4ae/88160142990.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6862ce9d0---80070353901.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa//files/4866051298.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/47978872941.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39523b01d3---gumonikosigit.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/milisusigimopagufumim.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/3ada2bf3d10fd3327ab0c5e7ecd655ad/nizisarenagamo.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/93617321065.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/92057147734.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611818a6075f0---60123143352.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/55114068816.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/7559648144fda9b754350230811e5619/78134189997.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/ef3mtaegv5jlbgb7sheken1co4/koridiv.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_off0000e957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 16300 bytes
SHA-256: 27af02b7e71ef7251e7c13dcd3aaeb6d8574f76627e3f9ab1a84115b4dcc20d4
font_01_sfnt_off00011357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11357 10952 bytes
SHA-256: fd0ddbb49797043e3492923e6c2c8f87574b6ae80637612a2cf773b82d6d41f2
font_02_sfnt_off00012cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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