Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6471d26acd832f…

MALICIOUS

PDF

90.6 KB Created: 2021-07-07 03:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5074099a04a4a656340b8290223843c2 SHA-1: 849f0bcc19a7d8845deeb2e1c765c5e192eb22c1 SHA-256: 2b6471d26acd832f381b87347de5512a151fd8702c97bc465ac86c5b26df577e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/86bc4aaa9f7b8bfd2cd04108a8a97db4/wodaneno.pdf In PDF document text
    • https://tylbm.com/Upload/ckeditor/files/8244140831.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/65744900207.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/51942649165.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/giravazafuko.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/965c561b18a4a296be5d8058fe01d8c4/46999778208.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/70829183650.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/ae61a73e4a192949fc36fb4d37f35806/lufitavoxevovezenu.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/pakukanipifaguba.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/erc5609tsu02kh9vs7o10p3k2l/segeve.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160985b2c5bf9e---27042167471.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/fidiwumamarisezeda.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089cb7a9e9a6---dimizolakegi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5619130e1.pdfIn PDF document text
    • http://taitung-house.com/CKEdit/upload/files/36141738304.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/202b5c92b489006967429991a5de460a/juzirovililometexuwatet.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e453b03e4---porumanopuxi.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf3a8232f---bexogujulupa.pdfIn PDF document text
    • https://bibliothequeanglaise.org/upload/files/sitokig.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/bixudevinuxawafiburo.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/gadefalinazumobowi.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acfe9ce5a40---nizoxawufetikulifulaje.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607816945efb4---penefisubideb.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad6aaa126de50f906abcd0206ea2a20e/dejonalosagedumupuril.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/oibc516iungter7qsgbe4h1srf/46270012701.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+most+offensive+memesPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/22445949c955603d025f7bc6ce7fcc0a/vibizibivoropor.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_off00010109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10109 16836 bytes
SHA-256: 50618704d3befe173d1c0d6614547d5492dad20e2e878b0b681cc956bfba834b
font_01_sfnt_off00012cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB2 10200 bytes
SHA-256: 7a4d45bfc9d3b903df1de9369bad1a0cbbf7a8e2636ceba20ee3aa14881a278e
font_02_sfnt_off00014372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14372 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1