Malicious PDF — malware analysis report

Static analysis result for SHA-256 c579ea501c0bc09c…

MALICIOUS

PDF

80.0 KB Created: 2021-06-26 11:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e14802ebe2f2e33f0c576da510e29f7f SHA-1: 1a29818350f3c2faea052dc34dde7e2cabe8b2ff SHA-256: c579ea501c0bc09ccd2dcfeb1328a7540c12b0187dde76b2bcc56ae390c0e094
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised CMS upload storage. These links are likely designed to redirect users to malicious or phishing content, potentially serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.2479

Heuristics 5

  • 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
  • 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://hrudolf.com/userfiles/63453028149.pdf In PDF document text
    • https://aashianarealty.com/file/45670834927.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608759e798690---fupaf.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/q8ffleactb662bnn59a0673ftp/kefolevomowizalo.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc4597f535---45037982547.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/wobumuvefibuvunakamo.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/svljtjse7omhdgnklsfnpkhj0d/kibanajinamog.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/ddd9549651c4232f83fe3194fc413283/sulewo.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/vanisilapexemivupokurike.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/q2mqfjh71ohenqoga64crc7k6s/20654176936.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/abfc8efc0102347c6e2603de57b74a67/29120156941.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/85951072808.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/gifosadupu.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607186230ac9e---nutut.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb02000871---rupidotufusinegaredabova.pdfIn PDF document text
    • http://iltorg.ru/upload/file/16594531506.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/9f5d387891c462ae4f66297d4eaf25b6/93529066087.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bcdd2a5cf---fomajenupexop.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607547c22d1f9---jotumadilepiveforogosipu.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/1c960beec42126162bfaf039086c9f44/78053421429.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/biviwoxilojitetijabaxepak.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/jamiwaniwi.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ddba4c6c5---35021699011.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ae0d6fb55---10634090937.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd703d98129---demajuvekakamegolukagofo.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6d8317423---gipexikovotudogat.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/1d356234f0d6344639fd2127707f8a32/moridafuwadujakivo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=soursop+leaves+side+effectsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A01 10748 bytes
SHA-256: d02cdef5a411d5843f11af525fe7ff1a18f585941665abe0f5c572976af17885

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