Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ce79dc6d35379e…

MALICIOUS

PDF

82.5 KB Created: 2021-09-04 03:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b21768b1443f1cb00152b3fa0ed86994 SHA-1: a131b8ad410c68a06884c7af4ee71483b561dc4f SHA-256: 03ce79dc6d35379ea5a5cf4e54456f715fa8f73b49c7b9911d64785f7a4747cd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to various PDF files hosted on potentially compromised WordPress sites, suggesting a phishing or malware distribution attempt. The document body is unreadable, but the presence of numerous external links indicates an effort to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://eventechsite.com/files/files/70994648416.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609439f876bbc---35113963256.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4f575a441f---6997422573.pdfIn PDF document text
    • http://didula.com/img/file/godevejigoz.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/33470269316.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/04f125eff0de49aad86e29a41945442f/vikebugazugoruvu.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/84783336082.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/46862939494.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/faa5e14a9a8af55c822bbbb727d825f8/27916205298.pdfIn PDF document text
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/jafunebazosigabivogavixor.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e71985533c---12489973349.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/ketefilipatig.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/20033685450.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/96420806101.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4991df9bd---86902623366.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/41371589709.pdfIn PDF document text
    • http://hongquangled.com/upload/files/padogeli.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/49421248298.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/rurisemefoweweleti.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/welawujebokodofikilirupu.pdfIn PDF document text
    • http://tedesco.pl/userfiles/file/44687081463.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/52518820500.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/ade265613d4d533b52df6c087851bf63/baxinokakunob.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/36f3eae730103fb7c7b18ee13d237372/52083395237.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=computer+hardware+basics+pdf+downloadPDF 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_off0000ddcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DD 16904 bytes
SHA-256: fe03cdef6ee7c88410ec6cab5ed6ea21b3951aad653fbf4bd3bc2925f1f965fe
font_02_sfnt_off000121c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C8 11240 bytes
SHA-256: 7eac98fa7422c4513def0afd191fb3e1093a1e5f9427f55c0b7299dedbd5de51

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