Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0432fd0b0c782d6…

MALICIOUS

PDF

70.3 KB Created: 2021-09-04 09:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: df4e10ca6e0b1166e81df386524715cc SHA-1: e37a98def8f4d558a79bd47561d12e7352477606 SHA-256: b0432fd0b0c782d6b0167c1cf577412298b8c93b1260b0e8fe4ee677386d8ef1
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing campaigns that leverage documents as bait. No scripts were extracted, but the PDF structure itself is indicative of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7455

Heuristics 5

  • 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
  • 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://laborke.ru/uplcv?utm_term=attestation+de+loyer+caf+pdf+remplissable PDF link annotation
    • http://padgettlawreunion.com/clients/79772/File/72663970377.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/kuvufesadexaxo.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/fs515mrv0jg5bq91nv0ui0dr37/63289069625.pdfIn PDF document text
    • https://btegypt.com/file/fikuvebejawukatesejewi.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/nufiximusitezawijar.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608d23f384cc4---puwakozipel.pdfIn PDF document text
    • https://strategie-forex.com/ckfinder/userfiles/files/wozeru.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/30885693864.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/17334626463.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b43348dae0---zufuxug.pdfIn PDF document text
    • http://thaidicattery.com/clients/f/f7/f7b4890cfba443994123e46b8078d6bd/File/49216796896.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ea6b2696c---24893153229.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/lozogusozinojefexokelaf.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/lukad.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c75be3bba2---zabusanatofajegedugojojes.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/ad854a39c140362b2a3f58944f80cd7c/mugobemosolejetokot.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8a6d8bbb4---rakesunanupibupipitizos.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/mezisabaxelotiwewuxoniv.pdfIn PDF document text
    • https://uangraja.com/contents/files/nojidet.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/zokiwujubi.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/d73a04360845980cfe9c220af988c7d9/zasino.pdfIn PDF document text
    • http://web68s.com/upload/files/55986981722.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/e9ofm231tlpfh7mdbi0lioisb2/45698565606.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/6cfadf78f839c8a0af3c4f5a7a774d55/30232894435.pdfIn PDF document text
    • 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_off0000d723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD723 11016 bytes
SHA-256: 08a8fcfe6a422efdb623678b342ec03aa075590752a4985d51157a50af183707
font_01_sfnt_off0000f08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08F 18192 bytes
SHA-256: 3fc11cfb050dc63586d6ab9892271297a51be2492262c2cbf27379b23b9dbd6f