Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddd1c08d08c3d8f…

MALICIOUS

PDF

86.3 KB Created: 2021-07-07 18:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c49b56ed442f58fe0ce30f9c4c9b5ea4 SHA-1: bc5b647b600da94f6822c4c8667f3f5e524ced9a SHA-256: 9ddd1c08d08c3d8f5282138e96cf7cfe039e1bab53cd600f7bbc9cdec783e268
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress upload directories, likely intended to host and distribute further malicious content. The document's structure and the presence of numerous external links suggest an attempt to trick users into downloading a payload disguised as an invoice or payment-related document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • 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.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fd27efb3---gozatixuponiwududuxuzi.pdf
    • https://iwistw.com/upload/files/33928641482.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/1682816a9ab71c39f4b8ca9209b968cd/badezatijaxe.pdf
    • https://sbufficio.it/file/gixuwatuvisufawutizedev.pdf
    • http://superplasticizer.cn/d/files/jabozuwonexafelipuv.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add370712e4---29948428361.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce21581e78---feganixifa.pdf
    • http://a-swiss.com/upload/userfiles/file/54354959312.pdf
    • http://kalikraft.com/images/file/vobobegaror.pdf
    • https://linardi.ru/files/file/25538389668.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/91e94f1553eeb0bef9580d1ab7f08356/78282537925.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/3ejpo6rnlbq42n0bq8is88hgi0/takusegusumazu.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aebca99756.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092f9ff03c07---vopijorozelimoxorupoviw.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/kanazato.pdf
    • http://rubivina.com/Images_upload/files/vimulanemuzitabunu.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160730a94d8de2---xifuxopaloxefog.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/0db91d907444ca8ccd39f03f295d099a/17051117000.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a458533c28f---tizibirimijip.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e46b805cb---85946727532.pdf
    • https://aashianarealty.com/file/vasek.pdf
    • http://turatabor.hu/media/pubedebexaxubazumowutos.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/16e6c52e2dd222b9300ec997288129bd/26336835273.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aab877bbbab---xufibelusozub.pdf
    • http://mopron.ru/upload/files/voxafaxonekagefefinelus.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ukbiq1tcvbj1d165a8cb6audu3/xanuto.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e5764eec2---99456212158.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=in+process+quality+control+tests+for+tablets+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 16792 bytes
font_01_sfnt_off000105b5.bin
bf7158764c62546d14657243a3272a85b0570e9b594bd4a7ab1a19ac4e99857c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105B5 11064 bytes
font_02_sfnt_off00011f29.bin
f3eee9dd8bae2c72c76586e287948bbd39ed6881f1d723b0e4117be102a2bfff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F29 16424 bytes

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