Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdfd2d34e23eb15…

MALICIOUS

PDF

299.7 KB Created: 2021-06-20 21:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f0142a86839f085f059274594733cf44 SHA-1: 10d17014b88a137db79f400eb22ae994cfa96623 SHA-256: dbdfd2d34e23eb15e9368a097477a91db3f7a47089ea7f9e82e402bd78a28dd9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The presence of a link farm pointing to compromised WordPress upload storage, combined with the 'SE_INVOICE_LURE' heuristic, suggests this PDF is designed to trick users into downloading further malicious content. No scripts were extracted, but the PDF structure itself likely contains embedded links or exploits to achieve its malicious objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

Heuristics 6

  • 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.
  • 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 http://dharmapremipariwar.org/userfiles/file/fezepise.pdf In PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/3f4000c0049349ed2d3d5aad0296b7d0/35342990691.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/373f554202d3dca8c03d58448985b799/gizudanonepes.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/90092556768.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/6qk3juhu10ug0kkhmgffs6ve97/89746672219.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/r8mikr15b3s8k1rfpilrtr9087/jowadoborezetadam.pdfIn PDF document text
    • http://gabortech.comadmin/file/67862701548.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c26d303a44ee0a1e58c2008474df00b3/benubesatuxug.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/dcda77a3d285897ef1113d4413aa93f3/55486362422.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d121150927---32466319084.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa47d2857a7---43186528343.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddf4882caa---11283438799.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f37e6bf49f---44121586666.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3a29ca60e---6052465832.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/055486b997540f6d65652ab1a448f4c7/10952257779.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a23600aaea---bojitosedimejatixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=word+crush+204PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00046c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46C77 5160 bytes
SHA-256: 23bf9e3b7d474b1b6082af2ab10b352b12d9fe1e9c762e3908eb03f3e4a7c824
font_01_sfnt_off00047e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47E1D 9868 bytes
SHA-256: 1c7d76955801054c83deb5066f67355ad153299b4344d6d7476c26da27e59700

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