Malicious PDF — malware analysis report

Static analysis result for SHA-256 44596bae6a4cef81…

MALICIOUS

PDF

120.4 KB Created: 2021-07-14 02:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 9d2011753fd27a093913baacb22662ad SHA-1: f4318b984512610692de14a46edf304d27fb8fae SHA-256: 44596bae6a4cef81477f53623601fca063eb727d1d1d851ac9c62f6b4751e8e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics confirms this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://laborke.ru/uplcv?utm_term=tagalog+of+appropriate PDF link annotation
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/nuzatasulogunedukaw.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/222mi9a939conb6t9e6br8js86/17871150348.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/aafcf5689da3f1106890505a1625996d/79708428879.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/49ork967l2rduif64qj1lf9fo4/tikin.pdfIn PDF document text
    • https://hissekurban.com/resimler/files/dafijalidavodesadejaziw.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/74109813377.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/79e22164554d10ed7a1f4dc22c8a8090/19672894515.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/vibujalewu.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/renukolusagisosiw.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/napolokazow.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/bagomipa.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/60906066460.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/lixepejanunubuxunoziwiv.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210608_120258.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/gtvbpp67pvu4qd443q7nohc5a4/36975428806.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/61387613203.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/a649696b60710a69dcfffa025e243c5c/pekonenad.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d033e1f559---xekowumagugiwomixas.pdfIn PDF document text
    • http://effektfilm.de/files/file/34236929474.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0102c8905---20584837550.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b216d36d2---11606033412.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/ku9m9fsef1n5u2v4b0ikkrkf08/duxupaneborukidenulob.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001534b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1534B 1908 bytes
SHA-256: f1a1d9b47b5eee2fade882070c3332651c81c60b8e604f9a9b670748226e5382
font_01_sfnt_off00015c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C1A 10224 bytes
SHA-256: bb1ca2286a1be2e9fbba88b13364905187985c2b1244e8679d04bb079623bfdf
font_02_sfnt_off0001732c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1732C 16244 bytes
SHA-256: b1ef7b52ed35dfd01120c19ee4193d967dc828f2fc549fe1a2d8c3c5029b4647
font_03_sfnt_off00018914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18914 19624 bytes
SHA-256: eb580546b4efe1a18c8d5a093a545e78ec0cf1ab734d344e72ecb007125e5dfb
font_04_sfnt_off0001bba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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