Malicious PDF — malware analysis report

Static analysis result for SHA-256 6092646d6a04dc7e…

MALICIOUS

PDF

99.1 KB Created: 2021-07-02 08:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9427e6e99496c95eb24cabf96424ba8b SHA-1: b9490859e6c55b27d0c3f685d500d9a1b108f85d SHA-256: 6092646d6a04dc7eed78b5ccadcd1f8538031e2780db5bd14e527555dbb6e4de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it's a link farm pointing to compromised websites. The embedded URLs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=bilateral+ovarian+cysts PDF link annotation
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/sanuzopebefodakofe.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/5263575373.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/moruloletegaxadojixofeto.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160810246baef7---zowuxagoserut.pdfIn PDF document text
    • https://isosklo.cz/uploads/lenorapowubimefubifek.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/532e4a8aeef00f1abade9db508d40ac9/joxemu.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160724886c45b8---11806523049.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd947df71c---59729775407.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/7fd1b89f9951983c625a8a6e1aee3bba/46551264390.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a54c55752d2---viwazopexapomulabususajor.pdfIn PDF document text
    • https://airbays.com/userfiles/file/24329854269.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/mijamo.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16081b0ffc9bdb---gevexudexosig.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/172c1d3ce4b3d7e866ea8ed3f1fcddfb/pomil.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/f4a98fd082a0ea52afe21ac1ebf27d13/61605677866.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a705d761843---remowukenol.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/fe87066414302e8b3754f0b0bd3ed8cc/vegitarulu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d72a4e5860e---wivapadirupawikavasu.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/47230659667.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/j4pa7p6est23deaoaq9392q6p5/miwifi.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210620042250_1827365459.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd0be2515a6---38599450753.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_off00012173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12173 17692 bytes
SHA-256: 7005f3f90f0fe0093d56fbb4e5169280cd21e3c5bb39de35f692dadcca9dbe4c
font_01_sfnt_off00014f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000167a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167A8 10456 bytes
SHA-256: 1cade6fde5ce5e0d1bc839bd962422c66e1c0d747f6248523a5bde356c1678b7

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