Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff122bff93ab325d…

MALICIOUS

PDF

86.5 KB Created: 2021-06-28 08:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 186ef56a1f2e664eb09683a6ed17788f SHA-1: 9db75b2fae299adf996d1db106f453fbba37aad6 SHA-256: ff122bff93ab325d9e7c95ed200e84400e23c1653966c7769b98f3623ee2b552
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous distinct hosts, many of which are compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the ultimate destination. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm indicate a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://vieclamhanoi247.com/upload/files/85618835609.pdf In PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/6ae5351c74a6bbf778353e5baf9819e8/79451489386.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/d42367459343d5c31198b4154feb82e7/82223663858.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/pedatelojazugasuregaw.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afe115c2346---12955391031.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/25773515520.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9178a42d8---popaxutod.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/38680296020.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/52323230149.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824dea6d706---89889792737.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/1efcd8ef33eae53ea1e91739c1702779/subotolanemunapenubet.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/kipixa.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/92080390586.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a579ed3eccf---41005600504.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/1981f507a3f48b89b0488dc984d8917d/lefivenivevaxa.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/iolahilqafrq41r9vgu032hn42/74674318889.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607057e1a1e28---luwowefaboze.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/594e2eb6f65756989cab69719cc59427/zemigobuxupoxuketonojopi.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2d202e859be00148baf757a711451c61/nixaroju.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f37b013d09---bazeferivuf.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/377664fc5e60c7985968682e60589448/69606443521.pdfIn PDF document text
    • https://mfdesign.hu/files/file/16742624513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=what+is+a+hexagon+anglePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 10384 bytes
SHA-256: 0244517f0f953605e718e3bd7f5bd90a0e6980363dad266ae0911224f4359f99
font_01_sfnt_off00010907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10907 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12119 16808 bytes
SHA-256: 0c8521da36b4f65ee2bdbb41645741df102c0996bd45e3758d9aa96b2e623abb

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