Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3d61b5716f1e59…

MALICIOUS

PDF

87.9 KB Created: 2021-07-17 14:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 64aaa36d0a5fae4f984e8358dca92700 SHA-1: ef1827e159b2063d4f3c6090cfdce459c202b799 SHA-256: 9c3d61b5716f1e5949a5cc1f5e78d1a82e3345745901339c6b870a447a7daf95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the link farm and the detection suggest it may contain embedded JavaScript or exploit code to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.
  • 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://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa4b07b335---duvibuzufizagut.pdf In PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/17f3d1b8c74b74fd5723a0c2b505e4a5/60530559017.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a3c2d972ecd830c1c5862270d6323595/fojifuj.pdfIn PDF document text
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/tiruvujasokanoradomekum.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/pagasawixidopusuriwigi.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/2104ea62533ced282b1e168d553fc3f9/26742618991.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/o03eb9er6232tchfs5835jvss0/43888755881.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/igk3t6ohod5jb4jl71j02aco04/vavegisakexow.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/76bacf93510bdad2103adaef8abe419a/mababeweror.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160793b43984da---44620981963.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/rivuvugipi.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/078f4ae496918c888cdd6a02f66e017c/sawibujokedagor.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/17580449104.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/0587c89d377ff32ad6429664605c276f/dirusovomopipumefi.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/navokulunizo.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/tedewexezekiwunug.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608183906b0a5---malegivozinuliwis.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab84d26fc94---sixufovit.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/5a5f5833e6dd16300b6d61580a5a1768/65136508939.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210626032913.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/87171912563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=valid+essentials+of+contractPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/adf3a328f68ec3e94d2e1405422fea19/43788960936.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 10436 bytes
SHA-256: d95f7e0c2ada39537db02520f8c4d89a626d04075c821e9f90db2fc27c9df91a
font_01_sfnt_off00010eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEB 16612 bytes
SHA-256: e86bac8ebdf083f49fa8aa9d539ff979beb14fb0f6892fedde880af7326c34eb
font_02_sfnt_off00013a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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