Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6ae488faf265d7…

MALICIOUS

PDF

81.3 KB Created: 2021-09-07 11:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4c2dca09aeacac0b035a1f1247898527 SHA-1: 6626f1d92578190d9b32b569e00240d33d85b3f1 SHA-256: ba6ae488faf265d73ed2bf434afa711b7ecf731b6775eba41343a8b65735a885
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains embedded JavaScript and a link farm pointing to multiple compromised CMS upload directories, suggesting it's designed to redirect users to download further malicious content. The primary attack vector appears to be a phishing attachment, leading to client execution via exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/f5485l8b5c2d5pthfaeamkjvae/91558883327.pdf In PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d9ab55023---63353940195.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/522e8d6ccedc677ab614915bd77fa2ff/47049199631.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/16783530904.pdfIn PDF document text
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/160801b83a8782---53330694615.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766828ce823---66571992832.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/meo9f41kd2n5jrlilk746q24kf/95562368785.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5256c83f85---20636687656.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609654d5e54bd---75732980446.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a90015746---58145074368.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/giritap.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/0473d4c0897eef0af4181693872fd6bf/jasafimofulezetixonen.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/c5d6a8c2c192af8c55c059863d6fbfaf/modesumade.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/55475577846.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608543ac038ae---sufibixuxajidup.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/runapolatogibava.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/57050968516.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/44629505496.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160981518c95b2---tomutit.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/misogebuseze.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/3et2lnrfosjod60180nt1qp17f/64339273798.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/nonexowowiwunawolawaxoreb.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/pejivisesoze.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/puzukubifuvapupibuk.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/37899605299.pdfIn PDF document text
    • http://erex.hu/upload/file/39020345680.pdfIn PDF document text
    • https://noddy.nu/images/file/23550408614.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=contoh+karya+tulis+ilmiah+tentang+pertanian+pdfPDF 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_off0000da3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 11280 bytes
SHA-256: f1f578d2422a68034d2d16044a47715ab2f0f523172a47ea172767191d17a78b
font_02_sfnt_off00010c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C74 16388 bytes
SHA-256: a510ddc1ee0f72f204349336786a116f65daa9d850800756032ac39c43104c88

Open this report in the interactive analyzer, or submit your own file for analysis.