Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6096c0612e72f6c…

MALICIOUS

PDF

69.6 KB Created: 2021-08-25 09:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d3cfab1567233818e30c90dfec8166d4 SHA-1: 0d8e212e2fae0e21f30edf0443bfda202a434b89 SHA-256: e6096c0612e72f6c535015a3f0ce1ab907aeae1fa82fa9c588816221a49cf41c
156 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded URLs are consistent with a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/ed19d5d155d0285b00aa5deadf135a1c/tipojuwiva.pdf In PDF document text
    • http://apluskleaning.com/admin/images/file/86519651563.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/79788792422.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087432c29109---18052896712.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/57472469007.pdfIn PDF document text
    • http://splogservice.ru/content/files/81796407005.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/fec24335180a60a5a89accbde520de34/tetidobaso.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/e53d541e763442768510f447d91528a6/86744817516.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/litugagezonopo.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/vapafasa.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6e9a9128b---bivifokupogexuwabupivig.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/3786a5c41df42e83814a97fd22b60b75/mikenogaso.pdfIn PDF document text
    • http://one9five.com/userfiles/files/fowilewiguvizerumej.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/11356668174.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1f02136d0---85339271209.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/45584593805.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/14790282961.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/76308038581.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/66568431126.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/ca5ee867e2f8ae4e4e8babbe226b7060/34261076726.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/32863509248.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=sq+feet+to+hectaresPDF 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_off0000b444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB444 10412 bytes
SHA-256: 05ed54e13438ebe4ec59117d13287f072a6240da904fde87b1dfbc8b4f5260a3
font_01_sfnt_off0000cc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 14560 bytes
SHA-256: b0aaab52054bb07958caf3272d64982c7a318428066f5dec4791979a53538ab4

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