Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a0046ca6fc4331…

MALICIOUS

PDF

88.7 KB Created: 2021-07-22 06:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9b1a1091b9e73788f91bb7b50e5f275b SHA-1: 88d2f65618e64b52ed9ead9d81fd1d7cf3f9a323 SHA-256: f4a0046ca6fc43314a5fc8ef54da7ac46112d22c408b8a0c0ed307b7573c2387
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059 Command and Scripting Interpreter

The file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a command-line interface, a common tactic for executing malicious commands. The presence of numerous links to potentially compromised WordPress upload directories and disposable hosting suggests a link farm used for distributing further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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
  • 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://akcjonariusz.com/UserFiles/file/ratiluzerejujiludutupi.pdf In PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfd78c1d2---92338350356.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f66fc9876---tukitavofom.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe811eb5a8---11530339070.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/purenowejesavi.pdfIn PDF document text
    • http://meyras-tourisme.com/ressource/site-image/files/36391725457.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/bc386fecc4fd00314a24b473dbbc7dc4/nogokemaxona.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/nuberojofebabobegiju.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/liwigavuwu.pdfIn PDF document text
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/81424980345.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160712e80500a2---48280522452.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ef039480f---33337995105.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/xineweki.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/16758927540.pdfIn PDF document text
    • http://mmt24.ru/files/file/torevajiparijaxif.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5bee64f3f---raduwedejotule.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/42c59fe5c043f326c61daea23a3c009f/rukibolujodugonuzutusat.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/felodig.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/14923501695.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af696914d3a---xidozezijoridaxodifejig.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/sotanedejusimopogi.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/mod6a388r55rp3uqu6eiharp2u/xiditokexigolodat.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/30732983063.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/94047280625.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609adcdbace77---bewudolisiduzuvegav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=information+security+objective+questions+and+answersPDF 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_off0000f676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E88 16844 bytes
SHA-256: feafc40d110eee6000db9a462367e078865f656d27e2b22a38f5b4e03dcaa109
font_02_sfnt_off00013a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A59 11324 bytes
SHA-256: c39f05bd2bb353b28b6f4e66db1ff1e6fe802f38a5ddb62a6bf376e47f248e4c

Open this report in the interactive analyzer, or submit your own file for analysis.