Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e006a0f1544967e…

MALICIOUS

PDF

86.4 KB Created: 2021-07-14 10:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6f7d2d5b02ab82454233052adfa5beb0 SHA-1: 71653c5ebfd5e6e9c79e69902f5d652bd3ee21fa SHA-256: 9e006a0f1544967ec0d96d69a3145bc11a15add152c407e35e7d96a1e2f90335
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a focus on manipulating search results or distributing malware through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://euroroma-bg.org/files/file/42990010203.pdf In PDF document text
    • https://cambodiadriverservice.com/userfiles/file/matazurikitakojen.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/56029635239.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf692f02b9---penugigaluwibirojavu.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/34e2474a927b8ec87a95087dccee7849/63187291776.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/c878eb918cf40f8a93243da072402ed9/35271221770.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/ad3d7aab357b91fa55eb4ff546d8087f/67419671128.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/didofuzubekod.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/diobm44c9vbql953kgi289ri0o/muzetifaxadutedipexe.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074b22f6c2fa---pumebilixuxofovabezud.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62112f44a952ae0c70b87b624858e48f/zokojitonukebofuwinov.pdfIn PDF document text
    • http://jar-ted.pl/file/niravabubidesoreximot.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb582678fb---wukumikunovoxewul.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/53587835048.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb82727f43---gesafajivivulabiwi.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/eca4d3fba131d547e5809528f6332ee0/39271299828.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/dufadoxezu.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/d3a43ad2c72d49933e9c2488c39e3352/farisemogozopufefemu.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c5eb972c8---14138144698.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16070976776b70---giwelovekazuzamibef.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/puxagabiwaguwelagifa.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/buramufawekewo.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/41238841793.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/zubajuvu.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/89460903754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=american+pageant+workbook+answersPDF 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_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 17320 bytes
SHA-256: a0424a7a447cb5339718371f461df5e674dfc4d786bd6cbd13dbd8aaae00f1e2
font_01_sfnt_off00011b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B04 10972 bytes
SHA-256: 2d9e89c3b43f1f88871d11520352175dd8d67951f1411b25314b5e9332358038
font_02_sfnt_off0001345d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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