Malicious PDF — malware analysis report

Static analysis result for SHA-256 609a654bbf2e309d…

MALICIOUS

PDF

74.9 KB Created: 2021-06-24 00:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a5b8c0f8b5872d77a0764a7596b620b9 SHA-1: b8ee4b4e4f6c231d2c66a45f98432abd5eaca8aa SHA-256: 609a654bbf2e309df9cc35fdf4d7ebc69a7b2bb180c67abfbb01d2a112e5dde3
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' in some URLs indicates a potential SEO poisoning or link farm strategy to attract victims.

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 https://huntic.ru/uplcv?utm_term=robomaker+pro+instructions+english PDF link annotation
    • https://thaiwoodengames.com/files/upload/files/gexifa.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/2semc2ki2guc57ep2l2me3m5qn/fimomix.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3ee4960b0---48521950997.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/6dfd26eb718fb0d83199688669937737/kinabugifu.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f342f1f3e6---pesawisax.pdfIn PDF document text
    • http://imaginove.eu/data/Files/27079451361.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/66781659431.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/xegidufexabiwuxewuwososik.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/foselanusixidex.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/gafitamaniviwumuwuwi.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/kiresinakoke.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/d6rf0aei93vormoehfbopkc9u3/sedow.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ca3a9c7dd---dezaxe.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/d4824fbcf94e5ada0a0087d6353ad9b1/19371719233.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/zisinotuvurajikamogudaba.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/79958998082.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 5556 bytes
SHA-256: 2e948069e8907c7725fbf7a9500c35bc1d5458753fa322b274d3cc6ee32284e5
font_01_sfnt_off0000f624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF624 12156 bytes
SHA-256: 640746f61ff9064811658989a7d31d7d8a77968e397179f31a27989e1187b98c

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