Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee39a2da38be8b48…

MALICIOUS

PDF

80.1 KB Created: 2021-09-12 22:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 83254dede616376c0e929541e2fc3393 SHA-1: 0262771664e6901f220a5b78eb483ef2b511577d SHA-256: ee39a2da38be8b48e846b2b54562a38a7d1b03dd77de87f319713f427a45e607
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The presence of a 'download naruto shippuden' UTM parameter in one URL indicates a lure for popular content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

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://vinabomi.com/uploads/userfiles/file/jowedonem.pdf In PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/pujinoxaleduxuw.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/dezujijoromojixewofi.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/bepabo.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/17323058715.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/28512229813.pdfIn PDF document text
    • http://bananamusic.tw/uploads/files/202109031208009265.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/42228409329.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9416c56ac---41593355285.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/31826727698.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/96803970282.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/19959074244.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/vejotiwojeke.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/labem.pdfIn PDF document text
    • http://nktrading.qa/file/files/bamifu.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/xebelunedivegobevekaturi.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161308b0f70ac4---6675372398.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139696e409be---xezonasuwa.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/zukopusufubiriluvo.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613b29f589ee1---65099237075.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/bifisafozonesusedo.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/18038555911.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/16710855406.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/6057611443.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=download+naruto+shippuden+ultimate+ninja+5+androidPDF 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_off0000d36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 17304 bytes
SHA-256: 9237cae5773a5cf0370d948db1219ef5901a89ee9163a657dde86ccaf2d59c67
font_02_sfnt_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 11108 bytes
SHA-256: 014aa57cd50bca5f0c91b4c230dc00accb6b15346ce93c9c755f403db9a21792

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