Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c26d68a597ffd7…

MALICIOUS

PDF

92.0 KB Created: 2021-08-06 20:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 75cd7857b2c46f2d0bf7027052c6f797 SHA-1: 65dd213696c6d1c199c8d019c0d856901ff60c27 SHA-256: 62c26d68a597ffd7a22b36daa8d8e73f28b11d140790ed48d7331f128739b27d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://muacuoi.vn/Pictures/files/ximumobeseraweli.pdf In PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/tcfs6g5mqrsmeu0j8juc767unb/82589035051.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160e7b66e415a0---dorugenut.pdfIn PDF document text
    • http://one9five.com/userfiles/files/96740162929.pdfIn PDF document text
    • https://artbynela.com/uploads/file/85292899624.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/xuzigulowiletanezufoso.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19910c570f---vamasir.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/bufidosadupemeromil.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/las5gth2rfg6tvqm1aic4rtm3r/28633303233.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/11277877864.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16081646be60f5---bipapofawunixeborixufex.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087534389c8e---kemivoraxa.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/anh3lo7jh8lt6c3ja7piioh4kn/wimepakubexobisozujazozus.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd7b50ea94---27584294850.pdfIn PDF document text
    • http://rilta.net/userfiles/files/19135042444.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896d4db5c59---gewasaweguzuguxawelutaw.pdfIn PDF document text
    • http://araonline.hu/uploads/file/63755488758.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/65268134916.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021051706140446.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfceba19c59---kipuwaduzalurolakudib.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3c082e81b---nelijobazapiv.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/bawirumebukekofotofuvatad.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/36478714831.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/cd14e4f5ad2956901981d0b0c9de2d2d/18714988993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=minka+aire+fan+control+resetPDF 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_off00010244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10244 18184 bytes
SHA-256: f6a9d4620d9b43d43ccafd84745b83c6bc9a6ad9963be119b7589bac7ccf15d4
font_01_sfnt_off00013283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13283 10412 bytes
SHA-256: 90e14b8d560d0d923e063b377fbae71c9df406719411379779ccd7a01e9c112b
font_02_sfnt_off00014a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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