Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ba56726128cbbe…

MALICIOUS

PDF

88.8 KB Created: 2021-07-04 05:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 44cf9d142552e663441d60c332e0d64f SHA-1: 3d9e7275eb59bd3fe7eda74fc9251ef8f477fdd2 SHA-256: a6ba56726128cbbe8b61844593789f642d2da00baea3681b0e14a9a917406dce
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs that point to compromised WordPress sites and other disposable hosting, forming a link farm. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document text may contain commands or patterns that could be interpreted as executable, further indicating a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://cructi.ru/uplcv?utm_term=single+leg+curl+at+home PDF link annotation
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2301e5b84a---99131929751.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/35492678865.pdfIn macro / runtime command snippet
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/22974f01a78b3824ccc550e728b8f2bc/25295777391.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/26655449749.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9f5be084e---37909946676.pdfIn PDF document text
    • http://vo23.ru/upload/file/23657565834.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/81942947768.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/90453f9d283f2ea11b01557fb3cc9438/49487640044.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12a70df5d---lumazutabamopelap.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608110f40ab77---94735970989.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160839554a678f---58629456048.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/25868186704.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/torege.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/56010706609.pdfIn PDF document text
    • http://lamdecal.com/Images_upload/files/dokabasufoferutumod.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f6c95da0---53241269319.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608f64f10867d---lufaz.pdfIn PDF document text
    • http://msamericapageant.com/clients/873634/File/gozesetijebigaz.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/9qvddc8t5p2ipn40j2djt8jqh1/41442754546.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/3281078970.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/8261efb4edd980f3ec37769f605ec9cb/87931567459.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/07c595b83e7d49ac8cac30408de1c25f/74055135864.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/2f6ae450cef0041788e555ae7559e57f/xabudizazi.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/katexin.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210630061346.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcrIn macro / runtime command snippet
    • 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_off0000f7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD3 17320 bytes
SHA-256: 441216bb8ca97278a2c9d256f5ae54750b479f00fec390745d2cc71409788291
font_02_sfnt_off00013d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D79 10684 bytes
SHA-256: aaf0170f6205c7ec999e9b57a657fff1358fb09946c95faf08b1b4c5c054f04d

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