Malicious PDF — malware analysis report

Static analysis result for SHA-256 64496be64911a7e1…

MALICIOUS

PDF

69.9 KB Created: 2021-08-29 13:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ced5b4cd05b1d7b4e5b457ccc7d5bf7b SHA-1: 9fdfbaed598e24c127afd66600ac51d133e037b2 SHA-256: 64496be64911a7e155849bee9cdd631e4168b7be40bb15c3eb7117d60b690d3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classification and ClamAV detection. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://ekolojikweb.net/upld/userfiles/file/14750984296.pdf In PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f655a4759a---berixodatop.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3a67888f5---17696745993.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/58733028034.pdfIn PDF document text
    • http://talleresjpg.es/img/file/92891743923.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/13652220222.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e7c7525b6---watilefoxexodanofis.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/guvujolurerexijuzimuxuna.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b56bb11870---42467217288.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/vikutuzufebozizovon.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/rovazodibi.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ebe2ce609---rezegaboweti.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/ec339a664ed121cf9b33b9537e100cae/zivuxasosebi.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/sawatul.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/bfvajpa3b0mogku6iugr8sg2j5/rupop.pdfIn PDF document text
    • https://esvigo.com/upload/files/73435603164.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073796b6179f---80416882767.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/30824836964.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/156f979b1d95c84bcb4e775e14fbcb63/31869270294.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/kd9coieh3s3jk92tocdpb1mca3/67537476811.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/rixip.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa98a4028c3---91790857033.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/6975873553.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=other+words+for+people+personPDF 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_off0000b25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB25F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA76 10452 bytes
SHA-256: dfbd2c6d2eaf4fe5db88caa7d7b7b18ee00fc51d72645e7bdb7233608dc62d8c
font_02_sfnt_off0000e237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE237 15968 bytes
SHA-256: b61de48c602715d85a139acddfd10e994c78defa7bd8c1286f8d85aa810534b0

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