Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d292df7d24547e…

MALICIOUS

PDF

87.9 KB Created: 2021-06-30 05:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c3c28d431b225d9cc1b68f4531baae5e SHA-1: 1f44e867af2eec63f731d870ba50e6a3fea2a886 SHA-256: 04d292df7d24547e695ec1b4feeea7eda9d390d213fe1addad397916a94bed2e
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations. This behavior is indicative of a link farm designed to distribute malicious content or conduct phishing attacks. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b99744c2d3---zekekowatogepilixe.pdf In PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/8930225edaa1de79ea84c433dc98960e/9863643702.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/kimuji.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/fumezupi.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/57409664901.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/43671020317.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ac49e3a82f4---47121782788.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/vokowude.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/73bd3a3834f28676abdcbecbfd9fcffc/47121127215.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608137ab68038---50803432700.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3afed357b---liribuzarorelemixijom.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/pegativuwawukigur.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34d4fc417e---77179930344.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/gafefivugapirezo.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/97946910023.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/88335979912.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/65974658445.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e53932241---koxafagupopukolurexin.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929ce113c2e---xenevajusizajeb.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/69f85efcb3a1b32df042d1c46c266f11/46118438514.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/bupuxisurupatikup.pdfIn PDF document text
    • https://xn--mietkndigungsrecht-best-gpc.de/userfiles/file/67181228027.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/85246097961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bill+of+rights+and+anti+federalistsPDF link annotation
    • http://irodori.kir.jp/files/file/nurososaxegapabinev.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_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E24 16848 bytes
SHA-256: ea38e342f5bd3fefc460c7cd9a1a9c8594fbb3eb63b8c41e8d15229690c0e2a3
font_02_sfnt_off00013a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2E 10688 bytes
SHA-256: 92c5de04484f98d6b3aae013120f99aff08d772c9e90074ac0fa13112b06f1cc