Malicious PDF — malware analysis report

Static analysis result for SHA-256 7adf3d3ea0573d6d…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 18:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 07cc1e40001ee4925209f87574cd718a SHA-1: aca6b154fadcb3b6ce6a4afc5ade315667149a8b SHA-256: 7adf3d3ea0573d6d18810d731c794ed0a1a24ab7c90494a092d4255457d211e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress uploads, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=empoderamiento+de+las+mujeres+pdf PDF link annotation
    • https://ukmalayalamnews.com/userfiles/file/xedopipawuwubipepita.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/tureranekizirefotuneturat.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/78451985452.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f4a37531a---60128905633.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/d72f1e0f3143ca1be2d26a39fea41e8c/dugapokesizebaza.pdfIn PDF document text
    • https://totounited.com/contents//files/bolulevoforudax.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607b00e990518---xoleforifofosi.pdfIn PDF document text
    • http://falconltd.pl/cache/file/86482144866.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c546688e74---61275183656.pdfIn PDF document text
    • http://abroadster.com/files/xalilivisutarujixopa.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/84292305790.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87fa328fa---87929792805.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a90a9948c64---wuvevanisaji.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c55074246ca---vijopifitujimiv.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/xurodabijimu.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/vttprdm3t6sqhkcenq7imo8tnn/1406923404.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2048e17f4---1884845150.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/73382950675.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/e4fff0adeaf78c66ed83cd5dd28f1fed/fugabojevixolomovugukewo.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/38636511610.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/lujalazovoropuzegara.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a91b17a241f---96005159289.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e72a308edd---78043529880.pdfIn PDF document text
    • http://jarosi.hu/files/file/58241265909.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082a66129200---57508345204.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_off0000dfe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE0 10872 bytes
SHA-256: 38f67b250a490ad67b867d2012e53817f5a7d413e52e21ac331b84e7b243acd5
font_01_sfnt_off0000f8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DD 18288 bytes
SHA-256: 0686e4230389879d116f0531727d473370eea9588cab0718b3b8ec254235e803
font_02_sfnt_off0001277a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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