Malicious PDF — malware analysis report

Static analysis result for SHA-256 0690538ada98d104…

MALICIOUS

PDF

70.5 KB Created: 2021-10-02 13:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5638c3300732a9c97826b91799e17585 SHA-1: 5b0c25dbe8ba3ccd470891a4cdddb83c1ed5dc5a SHA-256: 0690538ada98d1041e1a90020c3d8694027e3eafb9e2a40b95a53c21bca976b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to external PDF files, suggesting it acts as a lure to redirect users to potentially malicious content. The PDF structure and the presence of external links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.
  • 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://project-lovcen.me/userfiles/file/21562380387.pdf In PDF document text
    • https://baoholaodong24.com/userfiles/file/wuwomalu.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/pewuguma.pdfIn PDF document text
    • https://bursaphotofest.org/uploads/files/27654076599.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/98398866772.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/fd7fc6804ac558da50fa8760062a7bbd/bumot.pdfIn PDF document text
    • https://solucionaesp.com/ckfinder/userfiles/files/mudipeludodezagovujun.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/96970905038.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-9-28/20210928105614149497.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/binopovolawodulibaxen.pdfIn PDF document text
    • https://foulardfotografando.it/file/josiv.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/xodulajesalu.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/kawonekosuxagalerug.pdfIn PDF document text
    • https://network-italia.com/file/sibisizas.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/55903932405.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/46975913873.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/zunijojebirafejelataniraj.pdfIn PDF document text
    • https://sarenpinler.com/calisma2/files/uploads/17289986400.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/zajuvi.pdfIn PDF document text
    • https://energooptima.hu/upload/File/xobapaziwakukinimoto.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/subozuzominurisizelene.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/rafisame.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140dbaa993b3---32811076642.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/bowabatitalor.pdfIn PDF document text
    • http://na3.it/misc/file/pivezigepukigamofon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=product+mix+strategies+pptPDF 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_off0000b105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB105 16644 bytes
SHA-256: d0e488fcf168323b53b187e76e500378d6f8ca24568da29ed8cb573428e4cfc4
font_01_sfnt_off0000db67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB67 10908 bytes
SHA-256: 7450ff9b568aa236e0e06927bd0f75f0bb4a28b58cde04f5980397d68a15a9a3
font_02_sfnt_off0000f48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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