Malicious PDF — malware analysis report

Static analysis result for SHA-256 58719de2d49f1741…

MALICIOUS

PDF

78.0 KB Created: 2021-09-04 15:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ca1eaeb18dabef78776cdefd6fdac8e6 SHA-1: 91766207cc7e02a8245938c24dcd5774b70205a7 SHA-256: 58719de2d49f174130ef52e7c8424278e674561ce567605fa8e9ec505b278c36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress uploads and disposable hosting, likely intended to redirect users to malicious content. The presence of multiple external URIs and a high ML score supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://queure.ru/uplcv?utm_term=picture+dictionary+download+free+pdf PDF link annotation
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/fadb4c347803d1b741b7eb1208626aa8/40965533912.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160afbfae0b2f0---rerubidolirigidov.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b632370fb88---44101668579.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/21095656998.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/99311094982.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/9ddd819b7a43f72dc349f3c8a69e4dc2/22702693367.pdfIn PDF document text
    • http://charivne.info/images/file/59029781455.pdfIn PDF document text
    • http://mileschapelcme.org/clients/9/9b/9b85db73e8c1d5ae3bc18b6db4f26039/File/60392136017.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607127f5e0140---vuwuxufutevawovemosuzuz.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/wuwidonakuxufuna.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/ebb15e83eebefbdc9d80641681022274/joruxefar.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/22312964236.pdfIn PDF document text
    • http://kidneytexas.org/clients/861060/File/20815571379.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/62982655895.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/79522168270.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/85399463811.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/fcaa1ba97af1ab27efaf9b4b35c28bd7/figidulasutubu.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/legadanujip.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b2ae671b02---51105214037.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/ea7b44001f8ccff7e3b50eeaa29f37ac/18098618191.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc42ced0613---jumabefisom.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

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_off0000cd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD26 17308 bytes
SHA-256: 4b04acab1c67b02cbe62ad9049f086f33f034ab150f6d7773a00b227138db866
font_01_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 10748 bytes
SHA-256: 295d6aaec833cd5602ff3b9d4e45526697265c5ce18e7a1e3207c62f9f7c169b
font_02_sfnt_off00011239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11239 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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