Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f02af66b3fa36d…

MALICIOUS

PDF

85.0 KB Created: 2021-09-20 03:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a37e30e2b31ce480ce337162f80e69bf SHA-1: cfba134a63e707f4ec4725c3fb6725ce4139bbf6 SHA-256: b3f02af66b3fa36db2f9ad25196337e52b68bf312522fab599ca94fb993d87ac
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple PDF files hosted on various domains, some of which are identified as compromised CMS uploads. This suggests the document is designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://taiwan-tsai.com/upload/files/36510154823.pdf In PDF document text
    • http://pneusmarene.it/images/file/rerowapo.pdfIn PDF document text
    • https://pvesc.vn/uploaded/file/wetavujifu.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/winejonul.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f154203ae6---besafebezujujefidituriro.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/godavuxut.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/a50329d999a892781e1a3fbc14ffff6e/sukovijamedomezuvipes.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/11583128626.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/kedarokedesozilutobinuz.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/29557509265.pdfIn PDF document text
    • http://yepuco.com/uploads/files/saxidolawapalilazategu.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/vuxedogitumodiviwevikab.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/17178557304.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16147a6f217f16---nurusubiz.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/mululatologasarup.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143618a8fb06---47254008271.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/gazazalopexug.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/rusexupokedalifajez.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/buzobazaninekuretiximowi.pdfIn PDF document text
    • https://cncunse.com/d/files/97159185671.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/bedudumo.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/f07cafe4878fca40769f755adc457ae1/wanomotidexuvegudono.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/xanawirazufikitovez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pubg+lite+mod+hack+apkPDF 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_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 18228 bytes
SHA-256: 5324d98e20753127b9019c5b6acc9d1b2953de51891a97f789c5cccd0fd309c4
font_01_sfnt_off000115e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E1 10924 bytes
SHA-256: 2887f3bbb214dafe658c40fcc8580da1925c4b00f3b8f5aaaf7baa8e12fb760e
font_02_sfnt_off00012ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.