Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a0e07926ab42af…

MALICIOUS

PDF

82.6 KB Created: 2021-10-09 05:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 33d9711588ea36bdefe210cfac96c37c SHA-1: e5b7707c61791dfaeba151fd6192191420c7d8be SHA-256: e7a0e07926ab42af59439fa8c6fd7d18abb29a197a093a036fe824fb58548027
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://oteaexpert.fr/cite_imgs/file/46204337413.pdf In PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/19518656328.pdfIn PDF document text
    • http://xn--evdebakmhizmetleri-k0c.com/uploads/file/gonejezatufidu.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/kifexitowetate.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/28255091887.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442ce8b90d5---23548004257.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/25607070745.pdfIn PDF document text
    • https://apagar.cinemadossertoes.com/ckfinder/files/9321501231.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141117f0a8a8---72166356516.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/wukoripet.pdfIn PDF document text
    • http://darstin.com/userfiles/files/89278088019.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/filazofepevetamo.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/10753217762.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/85506603228.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/nudugozovimojugajuka.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/xomomevomiwefawexupotu.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/pefogegoponofikovapojupat.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/85688266160.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/9651149011.pdfIn PDF document text
    • http://ge-mak.com/files/50056505469.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/filamida.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109261350085548.pdfIn PDF document text
    • https://clubon.top/uploads/files/xupitusotilazusexalaxazad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=selina+solutions+for+class+9+chemistryPDF 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_off0000d833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD833 19720 bytes
SHA-256: c14fbf73d46a8f0ed14b38a544701876e7a7d4eb8d125e1c82752a5fd8527b16
font_01_sfnt_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 11056 bytes
SHA-256: 3ae93be613413f7e2dad5361baeebfcc38443188c0ad40fc834ef3b57c66d3b2
font_02_sfnt_off000124c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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