Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe36ee64c331fa9a…

MALICIOUS

PDF

88.3 KB Created: 2021-09-07 00:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 26046e553454d61d3c01e63cf16ae845 SHA-1: cd75362bfc529c8968940ba5b8cc69f6211f2d70 SHA-256: fe36ee64c331fa9a0432cfe178e7c4a929510549fba1f8c523de9488ae4dad28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of embedded URLs and the nature of the link farm suggest the document is designed to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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://chcial.ru/uplcv?utm_term=matrix+reasoning+pdf PDF link annotation
    • http://futuralagoparking.eu/userfiles/files/pomaloxeronigadafatu.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5272f50d18---wafokoz.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/kmg9talo7omganab50qvqd24j0/91020887895.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/wiwadexavaxorakik.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/dawurujimuxesejum.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087fc45c0cf5---32433119411.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/romipofitavade.pdfIn PDF document text
    • http://etnorom.hu/pictures/13276986210.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/loxatadi.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1612023a44b4ac---73115686170.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/51105056703.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/87557675279.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e2621431---rozokobawijuradijugotidib.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/4183ff1e21f40ddf811dfa3e25013b0f/7091696022.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a957970f66---pagilavugolulefew.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/1468061416.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd9b5cb6e2---nepuwuvunefaxos.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/8884118860.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/xinoda.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/puwotumuwunivug.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/raxabalodibidunupixar.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_off0000f410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF410 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C27 10724 bytes
SHA-256: ba5b812d740bba45e85817fc096681c8cb31485f0eb3cbc8e0a4e9a51d862356
font_02_sfnt_off000124be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BE 18172 bytes
SHA-256: e97e5d868e7bc63579643f487bb449846290ef2446816acfd27e7968909cdd1e

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