Malicious PDF — malware analysis report

Static analysis result for SHA-256 be993ae428affc47…

MALICIOUS

PDF

76.2 KB Created: 2021-08-16 05:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 5cfc18e2467d322d7aef61935093746a SHA-1: 77b3b4bfcc1ce48f09cac045453158438cf8a52d SHA-256: be993ae428affc477c2aafcc2750398c3e3d7e8b29fde0bce2be4b6d86dbca17
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://skonasystems.com/userfiles/file/17485901529.pdf In PDF document text
    • http://chinalabware.net/d/files/zorovujobivorasafepotugom.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/dkdul213hbcv963jmnemontp4t/83019621167.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/kunaturegoja.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/1c589a4a6d71dc93943342ce8c243c29/pezivukuwe.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/79696533034.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988298017b2---44141352894.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca9426b104---takazatimunejuwopu.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/wepifidinezabuw.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/li3dep59r4b2jf3aal3r3pank5/vodarekumi.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87e84e450d---98391960507.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/30846585848.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd593b9e27---gefubuwukekomalekafugufat.pdfIn PDF document text
    • http://palami.by/images/file/nodol.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/82632921315.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62837e7aa---59881342311.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210613043122_k8fi6s.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/tfdguu9klk42vgovqaj798jfk5/nusapobirijenefi.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/68515489293.pdfIn PDF document text
    • http://air-ned.com/uploads/files/nojoxekife.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/zalokur.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faa3e50f6cf---25903688113.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/tusonavimatikojipitijovad.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/72107098810.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/texogixiziguzo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=unblocked+games+6921+neon+riderPDF 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_off0000c750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC750 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 15688 bytes
SHA-256: 016c19ee4833dc27ffeab4e1dbe4f62c2990649fc0f5477312fa8fa62d6963fc
font_02_sfnt_off000107b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B8 11360 bytes
SHA-256: 8aa46906fcaec602414bd8c22e667d417fade294e6d757035dd6a5153b9c7afd

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