Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f974fc63f8ccca…

MALICIOUS

PDF

107.9 KB Created: 2021-07-02 00:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 15e3af6b5e52741c73e3311a1e29f660 SHA-1: ed8cb5716ba9cf64ad811b6e407fcfe3873c5224 SHA-256: 96f974fc63f8ccca475c1a8c7580b2c09adf3853ff2fe513b4bb7b2e3a899ba6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure strongly suggest this PDF is part of a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://catamma.ru/uplcv?utm_term=subconscious+and+the+superconscious+planes+of+mind+william+walker+atkinson PDF link annotation
    • http://aaaexpressheating.com/userfiles/file/24568794784.pdfIn PDF document text
    • http://janatalnajaf.com/basefile/janatalnajafcom/files/23037915730.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/tuxazezerapowuvekuben.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/71682032729.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/jijodukudor.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/3b4e28fa74ea94ca1160f78a7da5bdd2/36096285343.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d50f42d3a9---24033533809.pdfIn PDF document text
    • https://digireg.org/upload/rizupokilidoxibebigufo.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c434ee8187b---bezukulemaguzojetuvadoge.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f383397e1c17de7c1a75ff86790febca/nivik.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/f7615852282e9cca39720cc6ef40c66a/10294679826.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ruge62f8qq5htnj64m8ojqpsb2/zekavugajelovasixuvi.pdfIn PDF document text
    • http://wamer.org/userfiles/file/nurilatobimodomep.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/n1fu78o4npgh03cv9aq17b9ns0/kiwobofipupoditid.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/62a978978db2942fc2039301b134350c/83565207345.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/49139500031.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a0f8543f0---62649773438.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/603dab5ca8c7644c9ed0d20bc940bc5f/74376920819.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/idvirjtnn2ho9ba2i8h19vk6ua/bixoxexutufolizawur.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098ae5d6477a---lewemelapipikeka.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608326f19ef92---wiwawonuziza.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/bfbe7df1f7ae0238b35fcad2906739e0/luxesikawareginugo.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/46741436089.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/817fe1e378b8570387044ca01d85d09a/13388751696.pdfIn 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://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_off000141c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000159d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D7 17392 bytes
SHA-256: b6db813a2c364d303e1ed390e7f0ef031f71784497bfd574dd06934c80dc4c7b
font_02_sfnt_off00018735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18735 11380 bytes
SHA-256: 8395501014a2243d1692465494f51b29f35b76d0a1c0b1c97d27de69e3da5573

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