Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5689be978457562…

MALICIOUS

PDF

73.4 KB Created: 2021-09-06 07:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: adb26f176317b0286275c486295f0e0d SHA-1: 411b8b547b02290dcc89e9b986cbd845f88aa1b8 SHA-256: a5689be978457562a5347b43975699f00d42742c581da272803cd4269c8cc9fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and link to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7043

Heuristics 5

  • 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
  • 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://ncvpte.in/userfiles/file/72712547467.pdf In PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7b7225362---92441524586.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/56052252339.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/ge3adld52m8ese1ne3cvmgmot6/wetatamofivasos.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/94a198bba9b0e2a38b2ff437b5a049b1/lejijixijiv.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/molusufozades.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/wuzetixibi.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/27848812358.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/48234550324.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/jelanegi.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/93575e8e1b4c6b1e354154afdacb50b1/69627631265.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608591be363e3---74734991276.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/ripatirivijaf.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/lecbji53tci7fetmckqm7llm68/89757273607.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/xevewavo.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087498542966---97697279377.pdfIn PDF document text
    • https://menu2uplus.com/images/file/45042356278.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d27fc2b8f4---senapukofare.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/96708178ae57e157fee8c21431c76c18/nopibivenipuxurimiboku.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/156268f819a5230af1e6b51cc1705cf8/68981253423.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/56bfb539ee8b0280bc35bac2b942ce28/warozufom.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/88387057234.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/manolofu.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161238dd0e6bcd---80949254904.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ff56712b---wonojuratubito.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/f8e70b980de0abbfb4e7257ec9fef8a0/sifidovowekeximam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=bams+1st+year+syllabus+pdf+2017+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA7 18840 bytes
SHA-256: ab040de027b5b52142fdf063f33de3513395f6e92b7fa54fcec4687147fc8dc0
font_01_sfnt_off00010bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1