Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb1667a483d7b55…

MALICIOUS

PDF

89.7 KB Created: 2021-06-29 20:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1e88a2399d353c8478f06ae9b02376e2 SHA-1: 46d95d87c248b6c8a8ffa5ea7ddbe65aa4e1a735 SHA-256: deb1667a483d7b55e9dda9caebae30e0198bae219c4282e5578708da2def0835
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or credential harvesting attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ambient-interier.cz/files/files/fodigogoz.pdf In PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/81b8dc0227a4958a87434fe2f3361877/65197768049.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983d92e78dc---4574760264.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/is38ae30uc7f8tabi8qarmks8b/kopagumamumutalugesovem.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bis2p2q7kgpltfki5vk387s9b4/77000852784.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16089f8fbea75d---6485489824.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8be2a5059---92270691377.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/bepixet.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed03470e0d---fufisafurowamojavonev.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/1e51a1f8c8f7199db5d0fd02e9625ea2/41340410834.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f12baa674---megoka.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/mebudasakexutoripi.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/fokatenisokuwiteb.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/11204399510.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/2l8kv7cgmdc4s8r8p7ppcn37qu/52736630639.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/9311eb021080918530e067a09a8f1d5a/36856143826.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/nezagulebij.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16099d80696eaa---88218995254.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pin4st1v98msnl5lkv5pkc0pf6/53781656514.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074930ebaed2---26168423070.pdfIn PDF document text
    • https://chemasan.lu/userfiles/files/gamoxumosovani.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/28d58565f8f11b7a8447c088b0ab29aa/rakulagojeteva.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/22476560224.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/de2302d453a739f80b09e703cd2be3cd/29438748485.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=data+handling+class+7+worksheets+with+answersPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/abcef7f23f0c08d1eed7c33221772fb0/povibaworasexaberavomawe.pdfIn PDF document text
    • 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_off0000f9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B1 17624 bytes
SHA-256: 20fa29927577f2abbe31021cb5d37082642271246b102d9190c8bbd8a5d2213d
font_01_sfnt_off000127ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FF 10876 bytes
SHA-256: 7de449b8c9f9bc7d2d9145b3876b382677f6557e6c675e277b5dec8aad6cd085
font_02_sfnt_off000140fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1