Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2c393c5e99bdcc…

MALICIOUS

PDF

79.6 KB Created: 2021-09-05 10:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 156ece859475ebc8cba39cf9510e3f6f SHA-1: 1625465f7942fe84ec982a3f2dad8894be6ab32c SHA-256: 0d2c393c5e99bdcc607e5209352424de6616f3ec09c0b4c572d5c6ef1534c480
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16098af7968ecf---86337519381.pdf In PDF document text
    • http://beautifulmoda.com/userfiles/files/20791032040.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088b7c4832e7---57851556562.pdfIn PDF document text
    • http://dd-eng.com/files/files/80746356253.pdfIn PDF document text
    • http://soflcops.com/clients/83267/File/ruvuwaxemugorunavufufinem.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/finivezipezakesoto.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/3facc8e920cf490fb0cfca9088c965a7/xebijugixuporo.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/fujekepiduseponagitazax.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160c4641863465---13077958583.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/fuwowipog.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/56088254421.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/92785145102.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/kojipagekozepudu.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610dd34e3d7c3---7962159449.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c9ef97884---tarazos.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983bb83293b---11548240521.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/86798202898.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/88624020052.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/remeromaluxumumixen.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/9dda1acd277b2f019959ada27f5768b5/34272671384.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a8de2cf71b---lurigatogaxufajo.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/jagidetujujano.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/24152833253.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/pejuz.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/s1saknk4pqp93aah3e45dqqv1k/runobineze.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/83993834559.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=bitencourt+manual+de+direito+penal+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE46 18660 bytes
SHA-256: a784d7eb332337ad3fbe3f717f07f6d673e2ae94bba7ce28d61c8e3dc9cc88ef
font_01_sfnt_off0000ff2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 10764 bytes
SHA-256: fa6f62957c70d74501bccf36afec86be6ccd1346bb9cbf07b75208b44790e3af
font_02_sfnt_off000117f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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