Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e49e9409045b894…

MALICIOUS

PDF

116.3 KB Created: 2021-08-18 11:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 0cd160a808a71fc63dcae5351322811d SHA-1: 915ab82e3e8d8c963c8b5327b9292711337b6f72 SHA-256: 1e49e9409045b894ea0e5112d717f56dc2a36367aaef08c8f7a1c49f2cae13c6
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous links to external websites, several of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary purpose appears to be directing users to these compromised or suspicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://absigorta.come/file/suwigolesenovodut.pdf In PDF document text
    • http://uk-finansist.ru/userfiles/file/64988023332.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/80415579319.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/kupokarojipabivizojogitir.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/vesixopale.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/defetop.pdfIn PDF document text
    • http://jucal.es/images/file/ritot.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160903e69da621---41632541457.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/kgjmo1m1regr4qsir1b8pm9l2u/teketeluju.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/naravegadixewavodetut.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/mefuxoxefefugazugiweti.pdfIn PDF document text
    • http://etre-belle.su/images/file/44435614722.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/refixexijovilekadipanez.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160f53b0aa7d1f---90091877124.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/85470657273.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/94987390335.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/4504611613.pdfIn PDF document text
    • http://dogable.de/userfiles/file/2617684915.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/vefosomisud.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dd1368385---90265504111.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/69022755390.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/fometitufazizili.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c6e6a0706---patokovilopokadejisunino.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/sapadolawidixigisiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=libro+primeros+escritos+de+elena+g+de+whitePDF 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_off00015c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C4D 11144 bytes
SHA-256: 2b4009c56242143b4d975072ba82630993e9f4035fdd7b3e9b98f9a0f1fa3a6f
font_01_sfnt_off000175c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DD4 19524 bytes
SHA-256: 73774930d28d94eba4de17a0cc54345c373a78d09bde4b41bcbca710c4fa8a9f

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