Malicious PDF — malware analysis report

Static analysis result for SHA-256 106bb607a3e97f7d…

MALICIOUS

PDF

85.9 KB Created: 2021-06-29 12:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5bd36930d7b206ff95dddc64dc454b02 SHA-1: 76e79b1a6e5777553a1dd365836decb2f3a25022 SHA-256: 106bb607a3e97f7d66cfed6c029d5e7933dbc3bb49c06a803ba1f77d9b9e6699
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or downloads. The document body is largely unreadable binary data, but the heuristic firings strongly indicate a link farm used for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cd2ed5d45---60616383768.pdf In PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076b997278e7---tekap.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/lidowofuxujibun.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091fd5a8c9b3---baromomivukusiwapomag.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb7b441fe8---96162693342.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/n4stbnqca696gdkio2u66jf175/86617133175.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/70e7952582e7acb1afb2b0adbd9e1067/34529873120.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/40d0ej4i4k87pj5sd0cq688m52/38642524831.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc6a289ac4---molawonafejumenupuz.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/a8qkdectf601uv121qapv1fekq/xerapaboga.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b507c7c295---95360251216.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/15e5cd5a640f36eee2ef807f0c63f32d/budezenizubewonimojuf.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/2605689166.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/cb8be16b7e3a3addfb75ccae98232081/bukutaj.pdfIn PDF document text
    • http://garderoba.sk/images/_file/27708442282.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/86ed73ef259b490179cc55d7a7e0024c/fatoxubavog.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a1d6494d2---27838572761.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/manezuvujozizaz.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607608fadbde7---pirosupefevu.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2c89d14f8---70297519623.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/c5d8deb2c094b6de848bd4df458f3af7/57388990839.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9f9f442c8---gikibi.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886a87c6d1d---rijikokiviwomipexigip.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/42021172205.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/34o4c604tudk0m5i9odh3h8je5/wikixewofali.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/wilogugozunilawodanemezo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=book+group+questionsPDF 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_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BC 17156 bytes
SHA-256: e2c27ff1981a770b65ee9edb89ce6a3caf508a29a3c8de6316ee1442e22d5b40
font_02_sfnt_off00013206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13206 10608 bytes
SHA-256: 84984489fcd232ce5313979f64ec58c42d573d9f40d442f9edc527afa0a00710

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