Malicious PDF — malware analysis report

Static analysis result for SHA-256 46286024bad25698…

MALICIOUS

PDF

83.3 KB Created: 2021-09-03 04:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 447715d1a134b881b0aa1f6400c07e50 SHA-1: 13c802cfe8e99ff08c32e9c97766aaee546a0a49 SHA-256: 46286024bad25698204e4d5b4618b43fd4e27a2b77750b4c3659705679af21a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a178302e21---nixotuwivirigamazovilojo.pdf In PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebceed1eeb---wegovufevutasuniked.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/46527774178.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/4990494955.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/kowolebinemugixafiw.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/22547332738.pdfIn PDF document text
    • http://mextro.de/upload/files/ligekizuwewupakatifaxu.pdfIn PDF document text
    • https://domilot.com/uploader/files/89126976122.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/75912918994.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160aef609bb690---pidepixurenuxudopisiweza.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/93293349900.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f116e3a3cc---31620701149.pdfIn PDF document text
    • https://taiyotech.jp/userfiles/file/fowiji.pdfIn PDF document text
    • http://hncastlecable.com/d/files/fowaniximofefe.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/41619381295.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/084e5d830ff97d9efe7f63299e18fe8c/misuwibene.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/25606997604.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609965337191f---97575201622.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/99352504556.pdfIn PDF document text
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/nuviguvojifaritexamug.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16114a6e350936---70849228140.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/87574301908.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/43596932225.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/131637528404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=methods+for+synthesis+of+gold+nanoparticles+pdfPDF 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_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 11004 bytes
SHA-256: 4f8fdd0ea4e5869e4b6d2d862307e68c3a80c92b23abb45ed2a6f8b8db8d6f95
font_02_sfnt_off000111e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E2 17344 bytes
SHA-256: 64d298114a4ac7f8df63854fd80dcd513d09d5cdaea3a764df64e2840b81a02d