Malicious PDF — malware analysis report

Static analysis result for SHA-256 969c40b4ed6db7f3…

MALICIOUS

PDF

79.3 KB Created: 2021-08-20 16:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ce90b65bdfe98178137a01a9a37d6d7c SHA-1: 6687bdb7dd702cf44441f60d16b384bc41ac1599 SHA-256: 969c40b4ed6db7f31f478ff96d7db9610c0fb871a336089d2eddd9b6c9842702
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised websites, specifically targeting WordPress upload storage. These links likely serve as a distribution point for further malicious content, such as phishing pages or malware payloads. The presence of numerous links on potentially compromised infrastructure indicates a coordinated effort to host and distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8152

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://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e6a08e505---kidasorosolojesaxajukil.pdf In PDF document text
    • http://youngshiny.com/userfiles/file/1624940967.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/85908864240.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5a6bb7dd8---tojopenalexali.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/18885065219.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/juvufupoxijafofox.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/26504891243.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/95145662375.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13269dbde3---nozub.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f792c1a16---70298419062.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/lewexixikonakal.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/mowutedikejijavuw.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/30113f2666021bbfad31e05ba822601f/68575596638.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c91f040d9---movaromafixuniwiwonixuw.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/b49d8edaeb861da3cd660a69bffe7ce2/tiwulelodikadexabenububim.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bbdbc8698---lunijosisi.pdfIn PDF document text
    • http://balone.net/_upload/file///dexurezofezutomekupupu.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/revibokaviziriv.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/20727556935.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88b217fa7---datepulov.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7adcbb793---xilukelenip.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/sikumilezew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=se+puede+hacer+la+prueba+de+embarazo+en+el+sangrado+de+implantacionPDF link annotation
    • 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_off0000e28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000faa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA1 11336 bytes
SHA-256: dd0be7220f27976cbbc6aa51aaf2c019eed5ef7c80ee7a7f5b19482dd9d77eb6
font_02_sfnt_off000114b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B2 16848 bytes
SHA-256: 7fcb06a4294f3b1c1e873d2a4d74bf75bc7f117d42f743e72a5f4b62403dd521