Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e88c30cd6081df…

MALICIOUS

PDF

305.0 KB Created: 2021-06-28 11:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 98893d736890ba232b0843c1c83b1c2d SHA-1: d9be0f74b18cb1b38cf5f042ba8f26bbbf64f4c1 SHA-256: 73e88c30cd6081dfb4fa3c145e71aa835aa1078bc89bc67ae26511b6155f1e84
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malicious documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8435

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
  • 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.
  • 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://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3mqvmu25n3nuo9avll775cj32n/duvurupetutowa.pdf In PDF document text
    • https://sunarchegypt.com/userfiles/file/96821543945.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074883b0b20c---zukanug.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cc2e46a1e---rovemovidukelire.pdfIn PDF document text
    • http://pitneyclan.com/clients/c/c7/c7afcfad87c307b096642b2e35f52d25/File/mejukopubo.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab76b86a06b---79510573094.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/62337986840.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160871239389f6---sipalujokolalemufoja.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160888f2962077---62276069851.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/b3c66nhb84hmgglg7nbg53vl9u/lavamobafozar.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca2d93c374---26458840863.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/ponogatozazozigodibebete.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/piwosupot.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/6cdtfp20fkj5q657sdk7n4f1r9/51090747289.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/96c512161111eaf43c5ff9990bee128f/15713275463.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b82bd610a6e---35736277066.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/k0t3fb5jme4p2dfuqki3ca5vtc/zibolazirogubijigure.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160892515bbf54---89900071722.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160798889b17bc---38318504139.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d04e79ac1---30245667669.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608591994c9c3---jutijuvefezuganugoni.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/xafedavofosemesogomegede.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6bed01915---30767294925.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acd2254074---xiwunadimini.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d92156cabd2---46981211359.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160acdaa5e5da8---28001007299.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b6900a42dc8665b698ca2e1a9bf6e93e/bawopolotakupigobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=s+chand+english+grammar+book+for+class+8+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00040e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40E64 11484 bytes
SHA-256: 74ab1395518c7c8bebb95506f92997b8930c31ebef589ef9e419ff17210f2eea
font_01_sfnt_off000428d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x428D2 16596 bytes
SHA-256: 48dc30be1fc4122845792600c27096b07929b014770cddf03cb55fc3fa3044c6
font_02_sfnt_off00044031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44031 32904 bytes
SHA-256: f039248e1e7ef7ad20836b1682e1ee693ca8678529c05fe7076adb037285eb53
font_03_sfnt_off00048ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48EC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0004a6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A6CF 2568 bytes
SHA-256: 8c501f21675a075be1c5285d38bbfe65dbd2a4a7d764cfef958aee801badf3b6

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