Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d59a48549364e46…

MALICIOUS

PDF

85.2 KB Created: 2021-08-03 15:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8d4ca64a38b2ae4f292fefba582a8f7f SHA-1: 80a83dc25d679c10edfd61c8e55ef3d335e87307 SHA-256: 4d59a48549364e461b70b24ff5fcaf05d5dcabca07c662523c42992bf70e60f0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs pointing to various domains, many of which are associated with compromised WordPress installations or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URIs and the nature of the URLs suggest an attempt to redirect users to malicious content, potentially exploiting vulnerabilities or tricking them into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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=imagenes+de+los+reyes+magos+para+imprimir+gratis PDF link annotation
    • https://stmarys-perthamboy.com/upload/File/88074692965.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/kofopamabazar.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1624418072.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/64536324051.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607005c48a8e5---zonanavefufuvazavamumutep.pdfPDF link annotation
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f72b31381---dofogixu.pdfIn PDF document text
    • http://dzbnf.com/upload/file///zulubonuvakure.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dudaluiau9db2ie71ta7hvkp84/biwuxili.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/muxamuk.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/lepijabedijinupesojifil.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/rajidimaxotovubusolodu.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af9ed9d59ee---55842678183.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b55736e38---sedevi.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/14934730488.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/94696963874.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/99267782894.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/8278778018.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/62168118275.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a92b66e600---duxibizopi.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/posebifizi.pdfIn PDF document text
    • http://synergyproperty.com/images/files/fanenevixipewozo.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/jabijaditi.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/dst2escf46a56ufv2surl4opp0/gavobigawiliwamuv.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160c5779e247f7---35538718879.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A7 17520 bytes
SHA-256: 299687ffd4d9c0459c891c3fbc64fe6bf047d5ae86c5e56a8d659bea08420b29
font_02_sfnt_off00012cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFA 10800 bytes
SHA-256: 64b2ff327ba44f7f17e9104ae7f5d835a591275a7202b01568f508717eda7850

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