Malicious PDF — malware analysis report

Static analysis result for SHA-256 009ccb6c03a450e5…

MALICIOUS

PDF

85.7 KB Created: 2021-07-19 14:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f9bcd85d661cc3bd835b13f0a7c3e458 SHA-1: 956988dd7e8b2f049b028c7ec60ab3e83d14c668 SHA-256: 009ccb6c03a450e592c2ace50e3735f755e424ed6215c51a47947244956021de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting sites, likely serving as a lure to redirect users to malicious content. No scripts were extracted, but the PDF structure and embedded URLs suggest an attempt to exploit user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://bnbtravels.com/ckfinder/userfiles/files/31674291864.pdf In PDF document text
    • https://warungmimpishio.com/contents//files/jigoviz.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3f6429266---jojosulalurojufelazetofex.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/6f0be027d92b2c195b9b347ad1a02319/57462335433.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/b04774356dac306ec7c35de806d2614d/dabupaxof.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e69b3aa3c99e2f0601fdff8e8874c9d5/99988636171.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f172a1800d---fadunebo.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bdeaf1072d2---35637306140.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/bomeduwewab.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/migejulodi.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/tafumo.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b50c7c10f3---nonagokazu.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/t9va7576khgvqi0h9c6gglv9h2/94529088769.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/48556182806.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607079185e5d9---vizeguw.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/25655c59df38a6065c4d252fbd0e25a6/28253528249.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/65624784466.pdfIn PDF document text
    • https://noddy.nu/images/file/95573879786.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c889c1885d4---76293147853.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/b3dd2a53754829bacca5e47aebec8809/kekaxal.pdfIn PDF document text
    • http://suacona.com/clients/16856/File/94739616403.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/midafole.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/42954245019.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/f35576a1830b845f0ace3e1f061eb4ea/59243162208.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/gizefopur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=linking+words+for+ielts+writing+task+1+pdfPDF 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_off0000ea9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 17456 bytes
SHA-256: 6972ce3b52d2973379ddd3b3435d30cb9d1ed2f0d8cbcdfbcf0a534ee3ac29ac
font_01_sfnt_off00011831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11831 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13048 10860 bytes
SHA-256: ba33152c0113b7b30d2929bc88886e7ac0c66f552b597693a8fce2d85e5e6686