Malicious PDF — malware analysis report

Static analysis result for SHA-256 432bfe45760f910d…

MALICIOUS

PDF

76.3 KB Created: 2021-08-10 01:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c4f6c0f9b6e3dbb58fb1a729bfefd47b SHA-1: 908d88ed0b9cc4bde3e50b4473755123692a42c2 SHA-256: 432bfe45760f910d254dc5a725bb3e9c6f4222058a650d2f75758c439aca5973
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://clap-bas.com/userfiles/file/65270721244.pdf In PDF document text
    • http://gillyard-johnson-mahoney.com/clients/62114/File/80706600342.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/43299980595.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/2927540655.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03e56d0c6a---19603492800.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/kejejexotubikewepodo.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93455e60b0---talofaxoradonexigolu.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/169030c6acb4cf1d35713e38c71d6a79/26307667852.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/43240223556.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210524161643.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc1003dc4d---pederigedowe.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/xolufed.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fae5fed3cfa---68912051766.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/8e6f1d8f8e541ed1431e2a2e5f41ec6a/87058206210.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/50647477238.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e8cc24463---taposi.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/18f58a3a227ed350a5ddeac52b8f9fce/kabiporeliwaxoxuxej.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7b36cc424d4e625916d1f9fa079671eb/morafeporilazowoxijof.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a51cf085dfee369f751be02ec7c0f1ac/tuguvalupokus.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608eee32c3e09---nerubimaluviwevamufenop.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/guzitajafudedofatidu.pdfIn PDF document text
    • http://airsoft1.ro/files/file/2196503414.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/95e933d38641889b3f20d6b326f61358/wunuwipobanilason.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/9549105883.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=sai+baba+harathi+telugu+mp3+songs+free+downloadPDF 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://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_off0000c3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF1 17388 bytes
SHA-256: 5b6576bf181d201775d018aced3b9490377517cce222aad6b9b95c092ae90e45
font_02_sfnt_off000108a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A0 11520 bytes
SHA-256: 63cbd56fa273c785de554ccd2444b5efbe7ab0dfeb2ec1a9fe22af0773d25aac