Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff1029d1e21f192…

MALICIOUS

PDF

74.3 KB Created: 2021-09-08 01:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 322b093575eb05c507994c0533e0e8cb SHA-1: 566b2c0c9a401e67c3048791c7bfc2674abda63e SHA-256: 0ff1029d1e21f1927973d0fa66f4f24d1aece033b4be382c94e62df40299a6c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/0caa7f106922370ca47057583099d8df/95779429607.pdf In PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/loturoxukigova.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/fb3145452b5e2ef8d9cbec12e5ff1e6d/98159300030.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079c79247635---rawezegaxubab.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/soropirude.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/mtl376e8t9j1h74iqt157jn8am/92795094223.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/01f6f047c34f6b68ca47239699ade9fd/lufununaladajaf.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1fbfc68df---favowik.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/35ff4f71460d6e89d6ba0a3cd38d507a/kobejuripababefisarikof.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/5ee9cfdec5211c8b0149ed26814302e1/vofufasusamugelo.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/gixejakafepisadudavev.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/mokumolitetepetunibi.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/fefeliposegoweku.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/judajowatelenaf.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/3399027145.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/50497906239.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/wanutemipotadalibawo.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/sufidiponufaz.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/93570405661.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/3h62euaqfakers9ls8ji1330q5/pejikemufemumu.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/mabebudite.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/lojovixane.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d351b9de3a---48476519960.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/likilitogujanotaw.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/9m0fnqc9scggdgqfi9uq8qccmb/sonez.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161179249d0276---20135960669.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/72b32a24ac09c7d28c9e1519c401cd54/lamasakewavaxovewuwinom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=pearson+envision+math+grade+4+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/62cc469a929ff531d9ac75237659827f/90645022107.pdfIn PDF document text
    • 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_off0000c0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F4 11044 bytes
SHA-256: c1b8527a1d468d7cdfdf7bb78581f6217b9d9b15d373acd8296fe2140e7b589e
font_02_sfnt_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 16156 bytes
SHA-256: 58a356d5e34ea55a5d5039aabf8f9b03fed5e4f354354aaaa81b7e421023909c

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