Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd030e24d8285816…

MALICIOUS

PDF

91.8 KB Created: 2021-08-12 04:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f8f7b39a5050a56dc84e3e058c28890a SHA-1: a3871e681a86ab67375957bd94f59a35e60e35fb SHA-256: fd030e24d8285816c885e518b9d3e956c9fd462e578ed01689209334cabe091e
156 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 functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://kayapaliinsaat.net/file/44291984157.pdf In PDF document text
    • http://dermaktif.com/imgup/file/48980273036.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/nipisakuwozifurumiluz.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/11290773613.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bb69a0a37---71766486945.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/auupctdl0ca91p1n9fgi27k7at/17308388564.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021081010141873499.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/35080798313.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed7f461d89---30167301559.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607890c71fc17---73567428115.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/pejirenifuvawogu.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/latowefagoribijedaloje.pdfIn PDF document text
    • https://coevent.ru/upload/files/6290169344.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/xixef.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984ccf9973f---51809015573.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/29786836047.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/fdqj5morvcsssruem461tngrgv/55504557374.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8e773cedc8---78987349466.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/75969583896.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/pisezulixomeveto.pdfIn PDF document text
    • https://kaisar168.com/contents//files/tatovofutumejotudek.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/kuxojapumakadipibafe.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/5b1291c5c06e24a5c8e3ba155a861f58/pagejuluxawagavasixu.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/6b3cb3e84a127537a640b8bade20cef7/47946139343.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/botatumiv.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/kotemevadewajidigozi.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762a59e3605---48874934086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+hypnotize+a+cat+wikihowPDF 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_off000103f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F4 17064 bytes
SHA-256: a73439f7038839e24f923daae4a9dd1e144b414179d6ae74602bca318e04c666
font_01_sfnt_off0001306b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14882 10500 bytes
SHA-256: 2e36f9e5a06f16ac15dd94b0099d74cf69a7127a487888bce29d5710dbafd00e