Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbee57de2ed1931f…

MALICIOUS

PDF

81.8 KB Created: 2021-09-06 09:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 58ae324f6acd2ba1d388185d059784e1 SHA-1: f6cc90fc99176b5000eff72792819c4e5f0dc0e0 SHA-256: cbee57de2ed1931f87340d384fc6c9f11727426c56d772fc7d5f6d06601edfde
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.psychophonie-tarbes.com/ckfinder/userfiles/files/libovon.pdf In PDF document text
    • https://lesura.net/userfiles/file/zotokojumivofusadobexob.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733e93a7b38---13351490234.pdfIn PDF document text
    • http://produccionesproezas.com/clients/2/28/28ea8f13eb032e89cab2838ec144e7af/File/xulimazejarepaxedidagof.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/rejopaketiwubudege.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5c67942f7d4c4bed788f7b2e038282ad/sujowagapulef.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/xedobexufufidajasudew.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b58059d527---26223047752.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/43274905085.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5863c1bd17---kagewavorawizedeseni.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/42356672393.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/76626821570.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/374cb93b4e6218cf4a26018047f7bbdf/64700003641.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/dirovumugapisojadezevub.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/88603292836.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610a4fcc74c62---dapakuxadewafubo.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085b00d5696a---70670539839.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/muralete.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/57809056530.pdfIn PDF document text
    • https://lhorizon.ca/uploadHorizon/file/tabubukuv.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/rutedeku.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/95046937417.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d47d8d4d8---bufofisonemitazu.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/lepuxorujuwuguxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=hernia+umbilical+diagnostico+diferencial+pdfPDF 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://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_off0000de99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE99 17536 bytes
SHA-256: 2bad6963762c124860f9fae37e9830b65e7c60038450e107e77367d889ed8843
font_01_sfnt_off00010b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B4 11196 bytes
SHA-256: b6ca71ee31e317beff3512be63a846340556486c29f43ddff3b3ac318aed1080

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