Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eba1fd6bdc42c22…

MALICIOUS

PDF

82.3 KB Created: 2021-09-14 09:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 589230abd46f4c49057a34992f68e0f0 SHA-1: 9a989972bb5cd7b645039902a54135621ee3ea05 SHA-256: 7eba1fd6bdc42c228029ded7f6228bc4d133457edf8fccb61bc82a89ac2b5e9c
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with a critical detection score. Heuristics indicate it functions as a link farm, directing users to multiple distinct domains, which is a common tactic for phishing or distributing further malware. The presence of numerous unknown URLs suggests a broad distribution or redirection network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cmflower-kkc.com/ckfinder/userfiles/files/56855206267.pdf In PDF document text
    • http://www.abcklima.hu/data/editorfile/tufimazu.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/fudazipumogufenuwimunalo.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/52406665327.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/radar.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/19082722281.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/10058159532.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/rutifipadafemevema.pdfIn PDF document text
    • http://www.lalorraineperdue.com/documents/9230037298.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/losipafopesiwewomuset.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/54881756819.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/36608542623.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/bomolizurud.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/jigavizuv.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/40947330417.pdfIn PDF document text
    • http://firegallery.ru/img/upload/wenawilox.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/71443740866.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/fuxut.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/wubavodupikusogevalexem.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30058638945.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139ce17d2169---kawik.pdfIn PDF document text
    • https://onlinendttraining.net/files/52110006546.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9e00c5bfd9cf8a182e28479982041ee2/55516154700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=otw+khalid+mp3+downloadPDF 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_off0000d2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB02 10632 bytes
SHA-256: 587556ae760bf050d85ad0c58177f81229e7c59ec5f57913a1145939b6439598
font_02_sfnt_off0001032b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 21720 bytes
SHA-256: a6b66521fd641c5e2c3209cb43d506a4ccbf28809c258a75cc4e85bfabb4c31a

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