Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ee2b2ab7033b1d…

MALICIOUS

PDF

78.9 KB Created: 2021-09-11 19:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 84b72cc3614ded506e034a7eab07c47d SHA-1: 35c3f73a674b1fb1fee9745c801f871768c89e9e SHA-256: f1ee2b2ab7033b1d598e56461fad610e9af7863c3f0f21976ebe7efbe98cfa9a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of linking to many external sites, suggesting a phishing or malware distribution scheme. The presence of multiple unknown URLs points to potential landing pages for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pufexamupogasepixafivovaj.pdf In PDF document text
    • http://botosani.ro/img/uploads/file/24693283666.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/10200384592.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161320d6881663---47717686697.pdfIn PDF document text
    • http://ibnuaffan.com/ckfinder/userfiles/files/98836516830.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/1035046500.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/v3tg8l98oj83l0qfdmdamvcfai/vupikiwodizejog.pdfIn PDF document text
    • http://cserepakciok.hu/xdata/file/gekatiman.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/48337147726.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/70532776653.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/rukepapuvitifiguzen.pdfIn PDF document text
    • http://onlinevay.com/upload/files/63899625748.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/88154511525.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210907_505EF930B478F397.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/zafaved.pdfIn PDF document text
    • http://wsm.hk/images/files/vamoxupewegajumufudar.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/funogevedepikegurow.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/pudegiru.pdfIn PDF document text
    • https://produse-zilan.ro/files/fokiroxofupivofofirisu.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/nojitej.pdfIn PDF document text
    • http://keyday.ru/files/files/buzunuzexifatiwazaxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=boom+beach+tank+strategyPDF 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_off0000cef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF0 17804 bytes
SHA-256: e252596d9a218a64acb4633e95710de191a299598a8cbbe4176e60f91dd82132
font_01_sfnt_off0000fce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FB 10936 bytes
SHA-256: e75af74446f5b96c0a41187a056716687a833cddd2f8a978e746f8ba97ab7fc1

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