Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b14eda8d6b4f1c6…

MALICIOUS

PDF

83.0 KB Created: 2021-09-15 11:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5e63e41d8c5c3df8d483e95c6f43496a SHA-1: e5263324b815f0cb213806b2a650688717343d8b SHA-256: 4b14eda8d6b4f1c6de28d3912b4c762707d61f322b1d884808575f3e340f15d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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=programma+per+trasferire+contatti+da+android+a+pc PDF link annotation
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/306d99d4df4be0300987c96ae294b868/jimibekukopute.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/40646962705.pdfIn PDF document text
    • https://kitchensofdiablo.com/upload/file/92925192273.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/67844971903.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/zitibega.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/pufuxidoxavagovasofogu.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af273620ab---gezuxepaduv.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/94690509.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/milazip.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109120712549253.pdfIn PDF document text
    • https://andana.us/files/files/92890126186.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/10370373737.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffec42a5dd---jonufekiderikeripe.pdfIn PDF document text
    • http://sirinthepgroup.com/userfiles/file/65217198503.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/a186db1231beb268fb703ece6004b3d2/98083259073.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/dumososaniwit.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408fb6d76dd---78298339113.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/6871316813.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/43499000651.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/busosaxetesozoxavis.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/75903276099.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/69951959493.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/3667542429.pdfIn PDF document text
    • http://benly-carson.com/product/files/13788131149.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_off0000dd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 17708 bytes
SHA-256: 943ff6e2888f71d4348859009e26690dd907fceb59c78d380b312b4c5998d993
font_02_sfnt_off0001237f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237F 10916 bytes
SHA-256: 69041e625335826d3d7281d2b0b9440d567ab18a65b5d1ef11112fde93d55b68

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