Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3077a29621cd86…

MALICIOUS

PDF

90.8 KB Created: 2021-07-30 20:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cece566b14e5899855997a3606fc17a9 SHA-1: 8db8161a45c6a5deb966054ebe55cd7441352a0b SHA-256: 4e3077a29621cd8606848b36c9db633f2f2260b2496c6e136619eb99d4de4fd7
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 functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081427318be9---zalubudamuxiku.pdf In PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/10521860073.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e66f7b97d1---95214180717.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/d44f772a71982a614a3740a5e20d4c0f/99133094876.pdfIn PDF document text
    • http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/49939827622.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/99065187146.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///72539703006.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dac56b2fef6---nifisosezidarilirexadez.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c9f5274f4---pawejimosalejabisugi.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/nakodakukakujumugexiwuzuf.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078f0e57118a---70424044257.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/25337182283.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/sakuva.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/dosajeza.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/27706615075.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/torugokefetibazujotepi.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160743bc41c3f6---1075501689.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872048cdada---fenasegoziganagoresap.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/5f501da590c4ab3546bb2bc6cf4c1c53/jevorajit.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/46437121593.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/93387650246.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/tutun.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/61gajkhoip73bvcpqnpu3bu1e2/81994017294.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/lupajisipapowifu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=future+will+exercises+with+answers+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_off0000f3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 21872 bytes
SHA-256: 34867e5cf468021eb0c16b296ffd10ce63a56de54b4d5909168795b511cb8381
font_01_sfnt_off00012a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001423e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1423E 10860 bytes
SHA-256: 5cf5017c7f3c9af9bbdb7b3d1d1a1ef365d5296db3b94eeb63ff548fa9325051

Open this report in the interactive analyzer, or submit your own file for analysis.