Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e4176fd6f3673b…

MALICIOUS

PDF

72.3 KB Created: 2021-09-06 23:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 89e11a058a8ae11c87b403d2a74326be SHA-1: 32f055316210d642e2775975c210638d194ea0e6 SHA-256: c0e4176fd6f3673bd5b4b52f258391e25a4e734b8baf87a86fcb9e554d6673e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://regimhotelierbucuresti.com/images/userfiles/mawixaxug.pdf In PDF document text
    • http://qlinairnv.be/userfiles/file/baderibajuzuwusodu.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/6b0ac79f760d0aedd103b8ac2a468e27/dogebikosenanub.pdfIn PDF document text
    • http://zxsolar.com/d/files/35790201425.pdfIn PDF document text
    • http://mp-journal.com/media/file/jesazil.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084afb9582ab---dozot.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/timinobenoti.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7ospe36pqt47kj0729tojnvuv5/muvikuxotonekoxupirulu.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/48563315557.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/famoropimodafamopatizu.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/gulivikaweli.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/jaguzitowurutin.pdfIn PDF document text
    • https://rm-parketi.si/uploads/29725941340.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-02-10-57-04-28.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a47b8130030---88793505377.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/wutunoxizugi.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/63572049427.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ss6sv8nrk1uc1a6f4vgqbo0qu6/70600697504.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/29221215479.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/12576589695.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af400e3afc0---40661635416.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/5138d952356fab2debc16d9bc8483969/82798804742.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad13eedff6---70132433766.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/99934137307.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=diccionario+portugues+brasil+pdfPDF 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_off0000b512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB512 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD29 11036 bytes
SHA-256: 0820ed6e5896b8e0b79a46a0546ff5c496ceea87bb3a54204c1e8d903473270d
font_02_sfnt_off0000e68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 17368 bytes
SHA-256: f5ca33afaa939de0ea9b3ee4248679c06625a50e44c078d153c2a32b62b87257

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