Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae2050417f7410d…

MALICIOUS

PDF

75.1 KB Created: 2021-09-09 07:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 34a2656e725c415d00deb99cbc210bc6 SHA-1: 7f226cbb2b88aeee6af565d1ca2b1b2a6ca50dd7 SHA-256: 5ae2050417f7410d9fd49dc61fc0219cd9d0d1a1c50467f238474b66fd7050ac
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document's primary purpose is to redirect users to a network of potentially malicious sites. The embedded JavaScript is likely used to facilitate this redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://8njl.com/userfiles/files/gatifeti.pdf In PDF document text
    • http://carrozzeriabosini.net/userfiles/files/44955583682.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/50240908847.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/xasoxoxadubo.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/tapug.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/penowexarirenuxedawatu.pdfIn PDF document text
    • http://lgassociates.in/uploads/zelopixamuvakas.pdfIn PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/21380824583.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/25200360483.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/mufudoroditipududufo.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/vugofojofaj.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/87664706031.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/6c3d587583f059da2b6d8c9231a16a8f/63747816599.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/38388675108.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///tivetiripesuvorodorabawe.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/73008293810.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613017c96f3ed---1701741045.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/75308000417.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/rosuvemawolikenavat.pdfIn PDF document text
    • https://singlespeed-switzerland.ch/userfiles/files/40846760220.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=destination+c1+%26+c2+grammar+and+vocabulary+pdfPDF 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

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_off0000c091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC091 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 18456 bytes
SHA-256: 37c7ccf2b5b5dd5ce87ef03394f1ceea07f8f6f5af8b3d6b6c2653cdad898ff0
font_02_sfnt_off00010860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10860 10132 bytes
SHA-256: 7b5a9b096bf17e52e51df8df6fe7398ea7fca986b8f521f7c9dbac50fe85e7c8

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