Malicious PDF — malware analysis report

Static analysis result for SHA-256 7184359b9fb5710b…

MALICIOUS

PDF

104.0 KB Created: 2021-07-02 20:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 203367538caaa8fb2c2fce91d1dd572f SHA-1: 147e6c1673e71ee57c8fe61dab6709c055ee1717 SHA-256: 7184359b9fb5710bb86c651019ef1939b43aa25abd5318072c4002baa5db5fe0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains a link farm with numerous URLs hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution campaign. The presence of 'invoice' or 'payment' language further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://catamma.ru/uplcv?utm_term=best+free+expense+tracker+app+android PDF link annotation
    • http://ilkyoukais.com/Images/Media/files/25682062427.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/28433158483.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/eaec4439e52005eb92478c343e74e640/84764712651.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/pozoju.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c350e25d659---30280725597.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecd3eafab1---pipilekeva.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160da1a4b0eeac---48643272976.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/19118865866.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/nozilodixexos.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/30133749708.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609a09802fd0b---doburopa.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/c3jf6lc9ktdc9kjgaj2dj67rvo/dolelok.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f52f50c12---gelukudaw.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/479d7bb438d3931172debfcf9c1f8bef/21152743097.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/ec73c6abd4ef276833c9043632336e28/98151563889.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/ruluwokixemorij.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/84336541759.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9becf6cebcfc0a0a2a12dc7a9c47d66c/bevamik.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/82149007589.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/57552058581.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/gisibuxewumofep.pdfIn PDF document text
    • http://hopkins1983.com/clients/861771/File/wiwofopenexo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D7 10812 bytes
SHA-256: 519d81b56dd60e1a34f911416e506350acab702a5392a0b315d4063a2d929d94
font_01_sfnt_off00014afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFA 17524 bytes
SHA-256: 5c4f78a0057378fd00c24a6e6c2f569331727b5760e96733524980cca7f06c6b
font_02_sfnt_off000178d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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