Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c23c321c96ce779…

MALICIOUS

PDF

163.4 KB Created: 2021-06-29 01:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e7a1b1b0fb014223f0bd939cc8aad01f SHA-1: be713ebd95b1047d0725bb38898a9997de0176a5 SHA-256: 6c23c321c96ce7797d6c06d90bbe88dfb3775f6d21f5c7d6be9a12a3871a2644
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or redirection attempt. The presence of external URIs and link farm heuristics indicates an attempt to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9733

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://catamma.ru/uplcv?utm_term=ff14+classes+explained PDF link annotation
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb021a2c8---fetonekorusaxinidosobojik.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bdbbe15aa---81072619993.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c89a622252---1480445141.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/julazexigegisurulufufonak.pdfIn PDF document text
    • http://huntland.hu/upload/file/73595470086.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/mukudebepopix.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608925e2ee394---51791059312.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/475ffacc93007360d05106ca171c38e1/kipimefazudavonukaxupenu.pdfIn PDF document text
    • http://boxethai38.com/upload/file/wawepusa.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/buzefagomedixetavij.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/705ddfb8831da88d997603d37b1b5252/xububudegot.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731b632d163---pojuge.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/19191409024.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/9c86a85bb08edc79347325245dd6ace6/fubobeluliketiti.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/riwenara.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/euuv4cdf08619m8q2s6qfum4ci/9829085558.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/6b61651508ab0df09d870d3299762b61/fezekamisidibetupufenajel.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/68551d054abaf9a814269639daae9011/gulitotabozewajikuro.pdfIn PDF document text
    • https://arerp.kr/data/file///83000146587.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/razipeki.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160783183f3983---31871014852.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/a233e0b16a1a0d4b6c290db1cf65808b/67570438078.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1aa7c068e---jifudejafupevo.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4f1932747---banegotewik.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/zatixoxoraguzupefef.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F691 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00020ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20EA3 18512 bytes
SHA-256: aafa3a77ccf477fd0234388947e26f081613b67caf1c69b384819ba7d9c119a6
font_02_sfnt_off00023fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23FA7 12416 bytes
SHA-256: 69920d8c7d07e23c253e3348ef18cdcc2818acc7a57c73f0cff892cd1303ce6a
font_03_sfnt_off00026762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26762 10504 bytes
SHA-256: 524eb7d05d76c59f32377f40a78125a95fdc169646b18bcb72cb3b162c7fc16f

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