Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee11866498a88493…

MALICIOUS

PDF

67.6 KB Created: 2021-06-01 15:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 93898520feb3497469c1a3a5395895a9 SHA-1: c51bc2ef0fd64d8376bb2f0d2b24f4b3c2250882 SHA-256: ee11866498a884939649a758476099fdaa5da4f9eb7f56f1dde6fd3960d1a570
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It contains a link farm strategy, with multiple URLs pointing to compromised CMS uploads and disposable hosting, likely serving as a lure for users seeking movie downloads. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://petraifevronii.ru/ckfinder/userfiles/files/63473474643.pdf In PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/2d2fcec931099016481c5d5f821deef3/zobokel.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609835e1401e0---bupidivudawoligajusekadex.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/28eee67d64140cb47dcea7db8e514fec/lizozenafivedudusiros.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210601112810.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/a76c6716f489d322ff992269d61fba0e/52075446428.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1f6dc31af---dekuda.pdfIn PDF document text
    • https://bczenekar.hu/files/file/34989195623.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/nabutakep.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/5r5adu0kmpqe9n6c8kj5vpbjvs/nesobejolixu.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/b6a4e12e73d1bca3bc7d17650044d149/xotuginaxezobaxa.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096b989ed884---zizupu.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aab6f7d60ae---69188021062.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/805616c8ebbbfcc6c8ebc170b6c2edb6/fuluzitetirotukavovunos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=bahubali+2+tamil+naa+songs+free+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCED 5736 bytes
SHA-256: 8aad589f2cc14f07c4a0b2f3af05db62ec034709eab7f19dae28e2a5539ecf52
font_01_sfnt_off0000e05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05A 9760 bytes
SHA-256: 563fd520a88cb8c2bb2bf4e3d9b7ce878b8091455b026c5c7bc1987bfb5b38ba

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