Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d009c324aae3c6e…

MALICIOUS

PDF

85.7 KB Created: 2021-09-16 06:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 199067057812b9d76189d30881738486 SHA-1: 38d9c52194e647382a76878bb64b3c2da448f266 SHA-256: 5d009c324aae3c6ee899a6d39abd394458c906ce8792e3fec17140cae1ac21aa
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains malicious content or exploits. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host numerous links on disposable domains, a common tactic for phishing or malware distribution. The embedded URLs, despite some being marked benign, contribute to the overall suspicious nature of the document as a potential lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kultmotor.hu/images/files/97165687799.pdf In PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/mazufuzu.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/1108164339.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///weteselaxe.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/56130324334.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/cf6fc57deb9beae9cdea388009c03c6c/2589666697.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/20022981273.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56355171448.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/buduvetajarulovuruboga.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/rezibet.pdfIn PDF document text
    • http://momsystem.ru/public/file/90922778588.pdfIn PDF document text
    • https://brakos.it/file/1748964026.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/50033485492.pdfIn PDF document text
    • http://wohntraumgmbh.at/16449222896.pdfIn PDF document text
    • http://mislenyiallatorvos.hu/userfiles/file/58218314781.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/84203177999.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/kapebosox.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/17d52282fc52827d32dd8c659abadc43/letamabubekabab.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/pideguwuwaxaxonijole.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/wumawenoketixojero.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/telabaven.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/59815832694.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/nigujademubaxuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=aplicacion+espejo+para+androidPDF 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_off0000e364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7B 10520 bytes
SHA-256: 04f3835be9fa078b3ca476b2287468abf6b21a72a73087d6e4a85c1d7ce38dad
font_02_sfnt_off0001137b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137B 20836 bytes
SHA-256: df1dcacebd62da28cb54eb4a03cbb1e56f8f5465fccb51f59d1cb889af64a245