Malicious PDF — malware analysis report

Static analysis result for SHA-256 0700b5921c88a142…

MALICIOUS

PDF

81.4 KB Created: 2021-09-05 16:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: e0ee765a54f4f36e9a7e86958a7e5a64 SHA-1: 2ab626190e9bb4c30ac467867166e5de68885050 SHA-256: 0700b5921c88a142254cec0e0db96c9125b19c24aad0e9e2b005b4bc0823b583
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, employing a link farm hosted on multiple compromised websites to distribute malicious content. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest an attempt to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://oniceh.ru/uplcv?utm_term=socijalna+ekologija+pdf PDF link annotation
    • http://guides2alpes.fr/uploads/file/dirozoxoduzoboti.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e40f909fee---fozisabedavorawibazuto.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/12227530474.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/22197069480.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/f96039b70fd8e75d28dd84063b7cf2bc/93221071015.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210723051043.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e21b8260717---norazovewanujaxedabodezu.pdfIn PDF document text
    • http://ecologie-energie.com/userfiles/file/sinuwufowud.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/ponebet.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/80176219357.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/12b04bcf3081f5eb945d6b981f2c03aa/jisadexaneje.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/kevunokugotowemodo.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/20353243895.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607404b25f59a---lupukivasebuzip.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085ee28a9391---fukinogewopagosonitola.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fecf9677d---60496364994.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/24367013461.pdfIn PDF document text
    • http://altinay-law.com/images/file/69599936100.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124ec85405d4---93442785516.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/b19q772295ahp11ahbse8uce44/27297125704.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/4daf74c33edfe4de8ef24c3ddb04cca3/90390363383.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/86717597162.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 10728 bytes
SHA-256: e68ae4888dca15389cd8ba23bb0eaeb1ac520671ff3d3658b21f30f5bc4e4fe4
font_02_sfnt_off00010a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5A 18316 bytes
SHA-256: 87943e8c57bae9dcee94adcd580f3e4b73f1822ef6da565f955812c4abb426cc

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