Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3dff571db4e298…

MALICIOUS

PDF

84.0 KB Created: 2021-06-11 12:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b9a70d6e060ff81466be49b0810f8252 SHA-1: b07e64b69f90a15840bcc397f3a93f34348c03ae SHA-256: ce3dff571db4e298fab251eaa4075785f4b83187a2b14bcae8b0341a8f35aca9
236 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics, specifically a 'ClickFix' lure, to trick users into executing commands. The document instructs the user to copy and paste content into a terminal, which is a common method for downloading and executing second-stage payloads. The presence of multiple suspicious URLs hosted on compromised or disposable domains further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://infrive.ru/uplcv?utm_term=create+macos+usb+installer+in+windows PDF link annotation
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/123777e08ad802869c6a4fb41cde0bbd/64369480695.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/19160071753.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c4ba8bd2f---fidujozenibajafe.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/32cac99ec2cd3ac36ffab05b90d3d779/sijajometapa.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a97757743bb---79068747289.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a61d10a9cd0---57383527328.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/sh2s96c9dj2j1l0nq7jm2nrbt6/89291575011.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/lubekubijisesakinafe.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/joxebegumon.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1016716be---12694837771.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/1ae1ad997858fb31109513041d8972fa/tawilos.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/vadotatabobexadozafuw.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094be270ea65---63350075183.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/metofelugorubonixorik.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/f6d40a64542904a8d5855b1df9eb0cd6/kubasiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 5224 bytes
SHA-256: 7a4a1aad07cae5b087d870726c83a5fb1550107c8c57e1d8baeb3345273bd7e7
font_01_sfnt_off0000f42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42E 10824 bytes
SHA-256: 461af8a6ccba95f1906fd94430c25a53d035c4d246e5d15b758f492677c03648
font_02_sfnt_off00011900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 17992 bytes
SHA-256: aebed9579b979f2dcfebdc7979209637d232941b6959804ed7b76010e442af5f
font_03_sfnt_off0001344c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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