Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce96ef73775323e3…

MALICIOUS

PDF

71.0 KB Created: 2021-09-07 14:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7b3ad55039048399bb3fce0149f574cd SHA-1: bedeee560ae0a6f6b33fc5d199d78196abd7a106 SHA-256: ce96ef73775323e31860d84b39114e0f0d64b878ae093f16e75ff25cf7a94529
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the PDF_URI heuristic further support the attack pattern of directing users to potentially harmful external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://garglob.ru/uplcv?utm_term=hindutva+mukt+bharat+pdf+download PDF link annotation
    • http://sushigonewildtogo.com/uploads/files/13686691057.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/695655aad51ffb3ad9bd838cf0329398/siwivagetepivugobaziba.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/79174683949.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/59922452535.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/rabofebakamatikapariwaxe.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/11015952330.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/60765712697.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a797ba95b---19796420434.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/29875511617.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/45952264107.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/2feed4fc2b5de4ff13481a3b00d54061/rajipokukodadalim.pdfIn PDF document text
    • http://ghefoot.com/fckeditor_userfiles/file/43597659337.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/92994602931.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/pukopomomomabigipipiti.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/knek6r5ri1uhdtdafdq9f3b5rb/dovitifamedunetinuturifo.pdfIn PDF document text
    • http://lg-palette.com/upload/files/jenew.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/xafijugap.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/92e4a7d54c80414159a5df46ff50304c/jixobarotexigakowalagamex.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/35365335745.pdfIn PDF document text
    • http://dzbnf.com/upload/file///46534352091.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/b46242313814320f3b51cf14aae44a15/turezo.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160952ecc1aa62---dadiwikagexasefizi.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/250504754.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711fe713997---68679972965.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7c8db1b5d---15558140832.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/c83783f8ba3b9aec6d343efae0eafb86/kiwabifabuxixafoku.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_off0000b8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F7 14376 bytes
SHA-256: f753d81e5cb470c5b271d2ae17256170c49a4e2f69470676f675351b106e51dd
font_02_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 10940 bytes
SHA-256: 8884ac148acf030f4db16f23f97d3aefd1f68a9de8b21196d6ff70bc3e98a224

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