Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb72d3ffa9d2a6a5…

MALICIOUS

PDF

91.4 KB Created: 2021-09-02 19:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 57057b991cd622097b7df260b894d8cb SHA-1: 951180d5f782d2ae2a7ce1eaebebe7cb181f436c SHA-256: bb72d3ffa9d2a6a5f1a5b53df3fdc12a7066212a2a75fbc01d86e3dae663292e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/0830db919cdeb51ee04ccf010fa3ac31/nazurogenijipasokasewel.pdf In PDF document text
    • http://dbexpertise.fr/catalogue_dynamique/file/dujuzet.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/63088602696.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/jerajitepujez.pdfIn PDF document text
    • https://matharu.ae/userfiles/file/tinuwisavenetodonosere.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/0ivik0nb2eomlfkm5pm0ol8pcp/gedexonese.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16090afc38d175---51083580050.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/rugigebekilegejex.pdfIn PDF document text
    • http://inncredel.com/uploads/wapomubixalu.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/loravobulesebaniraxefi.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/0qeto6jjknodu1n950v3pa560q/jopejaropawaz.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/8cc0e7ac6c0fddc55671fb5a1bf1ab8c/kudozogapukogejarelum.pdfIn PDF document text
    • https://medius.sk/userfiles/file/75102860039.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/panawulefamelis.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/zinizozopor.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/18565102788.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/17653502509.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/91303733774.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/malifakuwisopet.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/9693827985.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/lasixonirasosu.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/25998351794.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/xipojalatagowisezaxupu.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160701251063e3---morikuzoxokixod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=digestive+system+notes+pdf+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_off0000ff95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF95 11008 bytes
SHA-256: c6fa9777cd38d18e6ed41cc14244a5969baea36d1941a09efd70a08fd9a516cd
font_01_sfnt_off0001190e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13120 17256 bytes
SHA-256: b4e6697e5a7a3cfae723a30a7424427be9b90ac4e4701ed2935eeb6b0e04b79f

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