Malicious PDF — malware analysis report

Static analysis result for SHA-256 07be80f27e05fbc7…

MALICIOUS

PDF

85.0 KB Created: 2021-09-13 22:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7d330fad2f30cbe453bd8f48094ec02c SHA-1: 1a6688df445299c913ace8cacf780c9b34fc8bc4 SHA-256: 07be80f27e05fbc75faf78c2e259709d58de3a31b4f87ffe61ac6ec3813396f2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, but the presence of numerous URLs indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://maternites-catholiques.org/ressource/site-image/files/41511494956.pdf In PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/64328083713.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/44ce2b6a3a3066cda6530bcca2f82011/netiwewexugofesumed.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210902120539.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8fa0e0cc1---45040315277.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/71796474565.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/30327348170.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/gijamisixatupidazowerewa.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/2472301913.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/nidevofidufomesowexajeju.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/file/1631160464_1.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210913025601.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/7030988835.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/xopevujimut.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/ketifemifuwufegatijubox.pdfIn PDF document text
    • http://thoitranglani.com/upload/files/rixobipavobuwetozax.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363d759efee---97021940858.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/rojesavubobawabevapu.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/38836973086.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/logatapurogavujip.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/tibajukasigogojiz.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/58907085028.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6398982cb---nogemejajorenatiduku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=where+can+i+watch+divergentPDF 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_off0000e7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A1 17952 bytes
SHA-256: bd9419846959eae0f0f5a2441a781d4416b05e1386c39f0d644f4660574e982b
font_01_sfnt_off0001168b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA2 10460 bytes
SHA-256: f138aa7c05f6b0fc8ff446d6eb3edbe6322b51bad4551ab137a47c78dfb1f3c7