Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93187bf95ed35dc…

MALICIOUS

PDF

91.1 KB Created: 2021-06-30 16:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b3050bda7a3398f7791305eb57634382 SHA-1: 228f24264a7960e57efd323f918b71085af1f3de SHA-256: f93187bf95ed35dc616ee501ce0eae614667328d9035b98322cca502f74ffab4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories and disposable domains, suggesting an attempt to redirect users to malicious or phishing content. No scripts were extracted, but the presence of numerous external links indicates a likely redirection or phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yssnewlessons.org/UserFilesTwo/file/petanezufufinokox.pdf In PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a21e56f5a---92391055955.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a57fd2a2fa---rinikuv.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae3bd5fbc5---95058240741.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/vv0iuu0571u33vavmvi1h73bq9/14838125382.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b558527233---vegegojijigurowukupeniko.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/c972aed1b885e4984876b953e835d010/jatubojabifiwikawalu.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/cf24c4976a7a6cf645b16a7218186336/52079602615.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083cf0968677---86176782091.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/rarilesejivopetopej.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/179d1fa414fde06f29d9b8564437eb77/10783116737.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/jorere.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/07422d7c73cbbb9a7a9908204c2908a9/70314821758.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/40847702080.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c05f2b58b0---befudotufajo.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20dd236434---tolaz.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/wapotilabowujopugudotefij.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607104764fc8a---sololutepigimopifeke.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/66014698776.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/b6dab816b28e0b5c47fa29047d7cb4e4/21124914805.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed7ca524d3---lujebupizesurulebewadevaj.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/lituzanetufewasisotijuju.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/glfrl6a8b1esqpni5truvc6g4v/52142478811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=bad+luck+omensPDF 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_off00010157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10157 17700 bytes
SHA-256: 2889e68c5d2bbf3366ceb0a515e5f10bb169d7080064658777a06222ad2044b7
font_01_sfnt_off00012f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F78 10488 bytes
SHA-256: 2bf8e5606af8a4d6812550b440ef91ad32e95ac2d8eecca053bb5add4a5b96d2
font_02_sfnt_off00014755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14755 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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