Malicious PDF — malware analysis report

Static analysis result for SHA-256 17296b5e13053cfa…

MALICIOUS

PDF

80.7 KB Created: 2021-07-06 04:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b9897c64ecaf653a840eb99368572c65 SHA-1: 5e93175d024d30d99b306f60333efd1d427797ae SHA-256: 17296b5e13053cfa6cbec17720d706b9ad73c9b6d92528ada153f43ff4220d35
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/daad91650526bcb6f92036c7d9f994a6/xalojiwuwurasozize.pdf In PDF document text
    • https://aarhuskortet.dk/images/file/5220823330.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/pma5gkvhr29pl9afm4f1pmeoe9/zusisofularitux.pdfIn PDF document text
    • https://deepex.hu/hirek/files/61933257240.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/55a408518c5af1dcf1de00b53e243ed8/827917920.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/gokopor.pdfIn PDF document text
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/21853549529.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/fc4e1d1de1789f7456c3d96d15c59e32/pobufofunu.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/44485943540.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/7aec78bb11fcc6f84e61a9925244da26/73578481681.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/elogvklhg2rl61sqg20ted5jm4/wamogedukiniwawa.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/10391128300.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/84412002270.pdfIn PDF document text
    • http://dade666.com/userfiles/202106file/2021061920513670554.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/d4649c449467e9a4e04e4d9e22bc8c16/ruzemobaterujarepene.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/jenuwup.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/71531864240.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/806181a83aa9bbdc3a6c0b60bf36bcfc/42052219036.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/dowoledoloxobofogi.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/e8fd64d7b4c7726a4cbd7abf3cec2357/bizuselizumobita.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/76311428290.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/kufuvoxulipaze.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/87417766363.pdfIn PDF document text
    • http://siembra.me/uploads/files/73758879231.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d2870b89d---13657897940.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=new+sexy+video+bpPDF 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_off0000d959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 10360 bytes
SHA-256: 7d914dfea499357f691196dfaff4851ffa2f7fe158b6d80e726e5e4573191503
font_02_sfnt_off000108ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CA 17136 bytes
SHA-256: a86d009001683a9f0dd561baab4969c0fd0d8df729954f468da775a622b432fc