Malicious PDF — malware analysis report

Static analysis result for SHA-256 c690d96393ac7f23…

MALICIOUS

PDF

81.3 KB Created: 2021-09-07 09:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1389f5b635f02b6c1ff77b8fa63d4824 SHA-1: 185634f113fd4412be9d2a9a798749265eea086c SHA-256: c690d96393ac7f238a06fec9f990747926b2f6e45e55577368eed6cfcef4cbf4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised CMS uploads and disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/59704003990.pdf In PDF document text
    • http://frigotechreina.com/userfiles/files/29317118306.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/52747426553.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/51647461899.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/sakex.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/j594r2malbkq3mujoeqtvkk0o7/rolifalato.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/fuvexanitixegupujapubub.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/09c65c306060d5310120c258b517cf3c/28992195699.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/2e375ab9e7183547d1e33ab42ade5483/tatelivoditowu.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075234c93db7---dubevezitasujo.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/54322016248.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/80746810187.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bec150962---zukaserimiza.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202108/1628019942.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/663862677.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f99cda03c---navosabolofapuwivo.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/daxuvawetekiwezese.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccd85b5bf0---91740190371.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/bofigamadipu.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c8046bf52---dupex.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/22771382369.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d567f122ef---24881098962.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/fepuxerotewubinomaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=hotpoint+tumble+dryer+service+manualPDF link annotation
    • 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_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 16972 bytes
SHA-256: cebec9d2213c20c42029db4a28e5edc722fb907e53ed1798fa792f3f04cbb657
font_01_sfnt_off00010575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10575 11088 bytes
SHA-256: b564a2494031537a7dd6b9621a742bbfff9544332a55a0d4471e208ad4d5b87f
font_02_sfnt_off00011f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.