Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e24f45a93c64bb8…

MALICIOUS

PDF

72.6 KB Created: 2021-09-24 13:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c6509fe9cb969b02847b0a914faefd23 SHA-1: 9a38d1869345df0e2a1b60c33e9013ba32164b14 SHA-256: 8e24f45a93c64bb834b955bae0c70978b67415ed11aa38f4dbf77638a0baa795
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

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 http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614184221ead8---99595920230.pdf In PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/13235398532.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/menodowowapujuvuxazuvoka.pdfIn PDF document text
    • http://letsfinal.com/userfiles/file/sofapawoxorog.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/dng9f1rh663c9fllbgv5s5iidc/22482813711.pdfIn PDF document text
    • https://dm288.rs/slicice/file/82477221014.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091117203642.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/bisekubusezijixogadimu.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/xapux.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/botarimakal.pdfIn PDF document text
    • http://rubella2.integra-sh.com/userfiles/file/92763412837.pdfIn PDF document text
    • https://varida-tech.com/ckfinder/userfiles/files/53322827692.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/nosapanedutubiropedu.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/durijewegibuwotos.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/voderusepuketuxijojumumak.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/46822587446.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/tobixobop.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/dinamit.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/889003741.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/36900386097.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b1765099d---gepuzag.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/jaromaxujunovawakoziwima.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/53046029220.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/vidugokorigokunusuradepa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=melhor+emulador+para+android+no+pcPDF 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_off0000b6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BB 17892 bytes
SHA-256: 78076e9ebc6044365daca9cc7d368d316f3c7b6dd5bd57df9d8d5ed5ffcc06c9
font_01_sfnt_off0000e4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AB 10608 bytes
SHA-256: 5928360acd96da6729f627a9ed802ddeda5d445fa3497dfcb01be2c8e4d4e8b7
font_02_sfnt_off0000fc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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