Malicious PDF — malware analysis report

Static analysis result for SHA-256 2096e19997933d87…

MALICIOUS

PDF

82.5 KB Created: 2021-08-27 15:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 984b177f8658b215a4b4d8314394fc96 SHA-1: 24a4b4f9706a438f421426a1b558bbd894979663 SHA-256: 2096e19997933d874eb04e73a4398cbeffc2e6247b96aa40c4e9308e713bba88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the presence of multiple external links suggests a malicious intent to lure users away from the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://nomylo.ru/uplcv?utm_term=awful+jokes+that+are+funny PDF link annotation
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/62ecc390829b73d0534789fe7514b741/61494612065.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/rerizugegezomusukisezoxar.pdfIn PDF document text
    • https://biocoils.com/img/file/vaduzakofezipazebibama.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/75307981144.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd633355e18---rimasazi.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/78265858376.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/2254393888.pdfIn PDF document text
    • http://becucci.it/userfiles/files/70086289793.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/fibemesidovodawu.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/fshgi23rrb74f43cd5sk0nhjg2/gorarapoludutigijefo.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc813e7762---91506018188.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/kududuwebevuxop.pdfIn PDF document text
    • http://computerdoki.hu/user/file/wufuredugenenojutofuk.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116ea19780de---gofunomap.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/433cefe6cdb94a652f2fd96a2a3742bb/kupegudureragemuxixap.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/31474688768.pdfIn PDF document text
    • https://shinaltd.ru/images/file/disatewa.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/89482640612.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/d0r9bpqgddghp9298m9ms4k2jm/10799307177.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/64231349065.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/reguxobunekapoze.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/ecv20mijf51687907la27098dh/98931268677.pdfIn PDF document text
    • https://onwater.my/uploads/file/xevabunubu.pdfIn PDF document text
    • http://plncse.hu/php_data/file/gibagegubekir.pdfIn PDF document text
    • https://raljob.com/userfiles/file/vawotijoramod.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_off0000df96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF96 10724 bytes
SHA-256: 21a14ce8abffd9fc9d38ce8a9bc45c8d7cc3fa5d0242c078e37e11a2643b735b
font_01_sfnt_off0000f85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11071 16924 bytes
SHA-256: cf9e549e3018f4be78b3d00d80cd97cb2fe92ffdeeca4fd828f6e5a1203bba72

Open this report in the interactive analyzer, or submit your own file for analysis.