Malicious PDF — malware analysis report

Static analysis result for SHA-256 f066b92b653d1b11…

MALICIOUS

PDF

87.8 KB Created: 2021-06-26 10:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2dcbd8be949727246e098a3ee2f4ee25 SHA-1: 87f46cfe231a5353aeecc0c96cd5d9f7cbb5d913 SHA-256: f066b92b653d1b11f204930a7a99068041455777b8c8aeb0fb02491a6603c06a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV both flagged this PDF as malicious, indicating a phishing or trojan distribution attempt. The primary function appears to be redirecting users to potentially malicious content hosted on these compromised sites.

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://coretry.ru/uplcv?utm_term=red+mage+opener PDF link annotation
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609656f8186cf---xedesazikugikekowi.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/jelolugelutuvofakunap.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b0538345a---vixegumawap.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d386b89bbb---41780121794.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/6c8364cb56b90c0b3c1054ad66801dc7/zanawive.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a1602530e---6030043757.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60d0125b0f491.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/gusipezure.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/27451846359.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/voxokujifizejineturosune.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/19512185442.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a1244e871---dakegoveta.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edd49d2b91---93461270347.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/698381372.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/95495918915.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/36200982959.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16096ca92136aa---78866453158.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/li41pr18q9rjdr9eppoj060tl0/gasiwonu.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070a3c132e22---xopefox.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/6185da0e14372e4e3fbad23526b95e2e/31660122942.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5785a5625---jowevavufodemi.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3676b3874e---kilikuxizowigamak.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088052408ed9---47244028756.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/32010147902.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/0bca06144ec65f54b23cf6ee9b518813/ruwiwokovunezese.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c685a12b94e---25368352437.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_off0000f328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 18108 bytes
SHA-256: 4ae1cb4a9dfc84a972c372c624a30f50f8e63859d2a3b9f9b746a7b0872b342f
font_01_sfnt_off000122b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACF 10376 bytes
SHA-256: e64bd2c057c33ca8a80720d5b13756d7df4088d6e58fbc6bfafd0d2bc38f566f

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