Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cf23b33205c5a8…

MALICIOUS

PDF

82.1 KB Created: 2021-09-15 14:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6f95d06ef56c50eaf6fa0d0659f1196b SHA-1: d762ceddccd1791c2b9b1152b08746953a9fe9b4 SHA-256: 02cf23b33205c5a8d8f9431fe7aec4743827d23c47c96d0bc4a31a8085987722
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://festacreativita.org/userfiles/file/11181809547.pdf In PDF document text
    • http://polesprogettazioni.com/userfiles/files/xozojejagesewop.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614007bb9acc5---fajesojubaratukobiwaxesu.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/suserojufu.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/cd798efb0790437240c8c634e7db988f/mitizufosevidemoradufaf.pdfIn PDF document text
    • https://studyhalltracker.com/files/file/befupebadozata.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/merolusorofamu.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/815e8be38af6c4015b7f4faf35146bcc/mejitupepidurumejafa.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bda92d731---30115019625.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee10478b76---mexigimebegu.pdfIn PDF document text
    • http://studiecarriere.it/uploads/file/nenajamexovubipare.pdfIn PDF document text
    • https://medtek.vn/storage/file/84469120947.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/59874302957.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/29327844753.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/kipivodezulukulikaziko.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/73400258292.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/49111487365.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/40199703369.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/69649938098.pdfIn PDF document text
    • http://flirdining.com/uploads/files/xixub.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/86956760777.pdfIn PDF document text
    • http://aurastaffing.es/upload/file/dodutifoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=makeup+plus+app+apkPDF 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_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 18500 bytes
SHA-256: a21b51a10a2fdcf995688e5457fa9d1a29808c9565e01f49e567eab6a60e2d15
font_01_sfnt_off00010c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9C 9916 bytes
SHA-256: ba20ebb1c3f9fded819e967a252f629a67ac11f6224243f46a283fd7b7712323
font_02_sfnt_off000122a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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