Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9256d9a47df54c…

MALICIOUS

PDF

92.0 KB Created: 2021-09-07 23:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 61218dc533f0fc8198c3acbb025a7e09 SHA-1: d1cf3652810534da2e26ca85081d266c53ed28f8 SHA-256: 5e9256d9a47df54ccd4d618a316f3d9a6d3505b426eacd320280d5dd13cbc6e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to lure users to malicious sites. The document body is unreadable, but the presence of numerous external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://farmaciafici.com/userfiles/files/muzudebisimirenol.pdf In PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c1c7f647---6821436189.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/0r2voem5n2nrm6iomls816ca7c/21374382562.pdfIn PDF document text
    • https://attack.lt/images/files/21094537165.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/ikkavuarfivd5n6eh4mvb71s7m/54252356948.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/a0a115c7408f8e5b7e5b75e22ca8b676/74949013236.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ef9094f9573acaf26ead8717f4cef722/dikolotusukunofod.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/midagepu.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/pakukejinixuzegokomoduwan.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/fbba3b870d5a61f413318a1344f8d604/tewatasami.pdfIn PDF document text
    • http://benly-carson.com/product/files/kuvenezim.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/33576743436.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073902916537---60009441178.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/521450979.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b09851d0521---sewawogeladovik.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/38245824699.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/eea01fa6e1104056b57ef823c16612f1/rimavejoxelikelaka.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/80881459677.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/58560715332.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/f06026749b72e95c38f1aa3c582b2006/98283768372.pdfIn PDF document text
    • http://nslogisticservice.com/userfiles/files/gobomopekivetuv.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/robejotadofojotemokiw.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160961b4358b5a---67305852009.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/98711707464.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=complex+sentences+worksheet+for+3rd+gradePDF 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_off0000fbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 11460 bytes
SHA-256: dcf0d26ea5b65a32478a305c513a446692cb2d1ed8d99f8d866a7c1dbbccd7c7
font_01_sfnt_off00011684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11684 19884 bytes
SHA-256: 8a8299a4bca3fe367525f75141636b86157bc05c9d93a965b6b74f9533b57f4f
font_02_sfnt_off00014a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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