Malicious PDF — malware analysis report

Static analysis result for SHA-256 02edbc86c0f2fcf0…

MALICIOUS

PDF

85.6 KB Created: 2021-09-04 08:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 01643f62c41154ec0d048c36d8d9b684 SHA-1: 605dd7c241e18c9ca727c5c006f702b470b4ef44 SHA-256: 02edbc86c0f2fcf0567d8cb8ddecd6dc9746b8a8b9ee8879902c05943b054a87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure point towards an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760c585b4da---55203217985.pdf In PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2664411beb2bd9d7db0a1c0c35b02a5a/dasilefobix.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/95659647131.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/55966268995.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100a2d2c0a5a---fenugedumimekotalasavum.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/mabemojuronanotix.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7d7e603f0---49198429650.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906e9e404f8---68569966156.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160be2c762fc1b---73732847029.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a567abd8859---sinopurodoxudikuze.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/joworadibi.pdfIn PDF document text
    • https://digireg.ch/upload/vukenonojaxuv.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/saxezojerukubuwuxifususe.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/dbc7acfd6b995b1b3b40355691531483/89961727737.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/3aoildt5e6cubsci8c3t1off07/renuruko.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/d2a7f7a1fcfecd5d1bad0a09493b6169/81806216041.pdfIn PDF document text
    • https://unaizahic.com/Files/files/28959239220.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/gipajowaliwikifomutu.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608134527f50d---13059891095.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/matemedosepuki.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/274374736.pdfIn PDF document text
    • https://andhimazhai.com/images/files/67226848484.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/48157322677.pdfIn PDF document text
    • http://ashioke.com/images/library/File/76782784091.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a288d53d7---10979293705.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ariston+water+heater+50+liter+pdfPDF 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_off0000e76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76F 18684 bytes
SHA-256: 0a71171516f92835265379dbaacb0668f1e1fb7847e547172ce02c58d205d3f0
font_01_sfnt_off00011708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 10916 bytes
SHA-256: 60008e47d0b611089e37fa1168f5486d6d1725e043d77776b1337165cc9d0d86
font_02_sfnt_off00013053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13053 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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