Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb8c5abf87896d9…

MALICIOUS

PDF

97.3 KB Created: 2021-08-07 14:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 930373baa857b2c68681678c713395f9 SHA-1: f59eca04591cde7e48e6df93b1c383275025e59c SHA-256: 3eb8c5abf87896d9b8266c0e0dea6fa0f1c823edb819918684698a637d466ad3
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 functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to lure users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate effort to create a deceptive link structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/5vf1l2fu8vrq8bin9b1bpk0u5v/vedinezelamanigapefav.pdf In PDF document text
    • https://champion-osk.pl/userfiles/file/54311218285.pdfIn PDF document text
    • https://digireg.pl/upload/93583267549.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/28078968007.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/hp76svuq4ep7q7ilrjsk228lju/kenobomogopawog.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/93445318415.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1610d1c1fb4011---kakexuso.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/titavezemubuwu.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/resuzezijapuwajadude.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/guvufolegidugodese.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/duzip.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5bd162f23---77460414832.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/51722664450.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/93tm16vr3mgmpagcjmtlgriafv/89072039543.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/papapeto.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/67570653722.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073f47aabd52---mexevudawozebapaj.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f5a913c4f---39880512236.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/37024035804.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/95914112619.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/18b0b07302936e4a950f953e9ed17b93/57419376991.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607224d41b05a---23774897989.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/ritejegumukunetupewujunu.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608019820f5af---kanixit.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/pofinutowafototanuliwa.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/56351677765.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+connect+jbl+flip+3+bluetooth+speakerPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11726 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3D 11288 bytes
SHA-256: 6bf45adc2538184deb44c0de1bb6381d0fc3b15e6ff2b80fcc3f19c2241dc265
font_02_sfnt_off00014980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14980 17244 bytes
SHA-256: 9d3d87904961da1574eb4c944c488c47708c3767d686d82c2d8f5cd77f206a0f