Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f5e740fab0df76…

MALICIOUS

PDF

67.0 KB Created: 2021-09-03 16:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 32575913da9d220b9fbb8fa35ed09831 SHA-1: 06a6eeeebb3f4afc991e75201da6f280564f29f1 SHA-256: b9f5e740fab0df76651b4305ccbba1ca1cbc82b72a008cb5b0dea30d0999a560
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan, indicating a malicious intent. Static analysis revealed numerous external URLs embedded within the PDF, many of which point to compromised CMS upload storage or disposable hosting. These links are likely used to redirect users to phishing sites or download further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4749

Heuristics 5

  • 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
  • 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://drafthe.ru/uplcv?utm_term=murphy%27s+law+explained+pdf PDF link annotation
    • http://www.petersonassoc.com/emailimages/file/38384554159.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/nodofo.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/95764436101.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/68901055590.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/82802480176.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/14534126578.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/t2u4vbceu7g7f363iklrk729ai/setiwakin.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/17hg1eqq0jaik3se0jms5g7r5l/78891057984.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160812e6f5147d---pukadowofarikukumaraz.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/mabepifeganikevidexekojas.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/biwisamugimado.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/tafejikeliji.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775801c6d9c---poxepen.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/o66tbgl44e72h25f7crhmo9s11/moladezebemujifafavab.pdfIn PDF document text
    • http://teraval.cz/res/file/mabuvotimevutitolulutono.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/76209615869.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210627_59D3B3A8A5EF45F3.pdfIn PDF document text
    • https://guijek.com/userfiles/file/gigixegine.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6b6c53f4b0bbc01ad09948f5e5160608/bevejuded.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/456df8c762438d092bff0ebd9e18b450/rolulazimusuwovob.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089100542f10---29229002615.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/forutikamewinasitopazefif.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2e452db11f36369fd7d6a0e67965d4b7/96081770178.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/bcb86800f5fb90fb90aa4e775bda4ed2/21890783553.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/losakomivukef.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/56674116738.pdfIn PDF document text
    • 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_off0000cc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE472 16816 bytes
SHA-256: 3b35cea4cdf2b2b26eca8dd13623ef4bbe9cef3c55ab0f6549e11e776fcacc6f