Malicious PDF — malware analysis report

Static analysis result for SHA-256 f592d7e6b77d22b5…

MALICIOUS

PDF

89.3 KB Created: 2021-07-06 19:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0531b7680354a75d478eda1c5c4c7371 SHA-1: bd7e7dac9ea6493aa75306bd485866985d4cc5b3 SHA-256: f592d7e6b77d22b5f12a8e50505c2f2d138149b3c3e1d66d46076959d03d2d38
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically a payment redirection scam. It contains numerous links pointing to compromised websites, likely intended to host malicious content or further phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, and the heuristics confirm the presence of link farms and payment-related lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c8b68d562---xozadubogokawolidid.pdf In PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/pomixakoxitelit.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b106e0714e---zuregebilu.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/sekipulugitedom.pdfIn PDF document text
    • http://www.ximangsongthao.com/app/webroot/uploads/files/wopalavexujugaxo.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/22259684096.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5c70ababc---51935165216.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/19589564729.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/47578901739.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/63c8922d1717a6f7d34ba49141e2a61e/nitezoxapokizaribajuli.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/runobufopugeka.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/96089244206.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/88959293c0476a05cbbdd807f776d9cf/95944732176.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/oi640e2r2v40bp33qpfobl15f8/sewozosasabu.pdfIn PDF document text
    • https://groupunsur4.com/contents//files/22023417043.pdfIn PDF document text
    • http://mientrungpetrohotel.com/users/files/kenaperisesijewenefa.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/6b65cdeb5fd0826af4b93729a28acfad/dabanino.pdfIn PDF document text
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/49214281694.pdfIn PDF document text
    • http://zuche0551.com/upload/file/8184592765.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/8eljk70c7otvhooet1593gmgt7/releboratibonufu.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/1cbb6ed876a784127700c0571c8669cf/47042834479.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/a30isi03fh6m2utdrer4u42nme/97155504839.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=cpt+code+for+facility+feePDF 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_off0000f727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF727 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 18048 bytes
SHA-256: 824c7ef24480662a31665405c830fc5018a873c2467d275dfa1228dc09de219d
font_02_sfnt_off00013e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E86 10484 bytes
SHA-256: 0b1862a8a6027b1d948e85bdf316f295ae6f8d900dc6da300952ee0ee1ef3157

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