Malicious PDF — malware analysis report

Static analysis result for SHA-256 00221bc08f218dfe…

MALICIOUS

PDF

102.1 KB Created: 2021-08-05 18:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 60de7df2ad392d8a3fc4bf47ba6a3c90 SHA-1: 9dde159334de7cb27065eacbad7795bc0dd2deb0 SHA-256: 00221bc08f218dfea5e06b5a59a1729fe5a0c0ba9335c9a2845f7bf8234522ea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. Several heuristics indicate the PDF is part of a link farm hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd75c98ff---pinapozazoja.pdf In PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/88630560939.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/61230740349.pdfIn PDF document text
    • http://semot.com/Store/userfiles/file/rizelafinawuda.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/72980571312.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607570e24f1ba---35218911991.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/7a67ef54d94b7f245b0807e40910ffb1/texaloxunuwadogumole.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/e2870f263d2eafa518d04f0cf65a3e4c/lujakadekodadometavixi.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/84fbde3a4ca00c56b546009f5a379b70/38257016086.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/31682274473.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/38214984705.pdfIn PDF document text
    • http://riverbendhay.com/clients/4/4e/4e1cbd84181290ddb66fb035c9950ff6/File/satopozop.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/650cf7606950e832224a05f295c96329/juvokokaxopinifudob.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/71038608848.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/49c873d4f0b16d72d2f97e7bc1751901/forabinaweken.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/22889fda4f6da80300a19c831b168b32/nowujavilonemulixagalo.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/176459600060b1baa77ef5c.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/rebilozokovelizawuk.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e1103aa939ba04c7e6fce103c29d2fb4/pogemazaveremimesigofuri.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/d69959ce72741c71bce31170cd2862a0/3789624911.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e46712db4---nijiwapi.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d430c0b5d35---wutofonakalotajejesajetev.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/ziwumoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=new+english+file+pre+intermediate+workbook+key+pdf+free+downloadPDF 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_off00011988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11988 24140 bytes
SHA-256: 8e88137c0eef3ae4f22ad560abbcee7d2005ba1b312ce3ecd312ab28f543e967
font_01_sfnt_off000155bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DD2 11356 bytes
SHA-256: df3baed49aaa3e9583bb9ee369fcf631eadfcee56727b2cbc79485f97974b81f

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