Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a4295dcacc8a8b…

MALICIOUS

PDF

202.0 KB Created: 2021-06-19 07:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 82df95b08495cafbe719fa594c4fa696 SHA-1: 050c3f669999e8766d04a589520bccd984b12900 SHA-256: 82a4295dcacc8a8b6f422425a761895df798c00994933b3e9018a30e1bf2bb51
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • 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.
  • 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://catamma.ru/uplcv?utm_term=spongebob+movie+2004+watch+online+free PDF link annotation
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16072bfc55b1ad---botasisukubogedibefirubi.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/49b4f5531123b9752d25766357c2390a/270929036.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/zilodozitevogibizu.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/c08dcd512d6661c90aabc7a14b99dc00/wenuta.pdfIn PDF document text
    • http://imaginove.eu/data/Files/goxigesanixelimon.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/91177dedcf580072a7322ecfe268c25f/99423442850.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac41d7918---22394417448.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac82673798e---59858879943.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/44390926800.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/xulawimo.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/97767602193.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160701ac0a2921---zosizekesolevonarezobe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002cfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFA9 6008 bytes
SHA-256: 1c6ebfa6b0cac37af6381cc451c59f9849725c6870c0848f587daab6e5bae135
font_01_sfnt_off0002e413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E413 2944 bytes
SHA-256: d43b5729dec5fc68569492aa27978b1487afd722eaad0d25feeaff0f4fe6371f
font_02_sfnt_off0002ee1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE1A 13196 bytes
SHA-256: 0b874cd3327df894542a009266b847d83db1e3cd26f5762becfe6a639ad9d1e3

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