Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc87d2cc3ead7a8…

MALICIOUS

PDF

92.0 KB Created: 2021-09-04 05:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: df6bf1faa27c0f4bc6fefe08d55ffd93 SHA-1: 08317928def4881d75ee0eaefb881e015ff43b65 SHA-256: 6bc87d2cc3ead7a8cdb4c0f683370808f262512138060c32d70f292e742fe8d4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

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://lmleadmanagement.com/userfiles/files/vopixonup.pdf In PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/32605845663.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/bujenogikutexojabubivozu.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a477eeaf5e7---45737629523.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///posenaf.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/5cggg19bms3sue466dbthud6lp/11739975137.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/342kro20ev2a4qhj259dgl8t0h/78910432548.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/67524995125.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/59b584255bf8919fb47d8d563586ffb7/36432969713.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/xojapa.pdfIn PDF document text
    • http://iuoooo.com/filespath/files/20210824195835.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd336585b7a---kemilo.pdfIn PDF document text
    • https://www.seblocation.com/ckfinder/userfiles/files/jepujiw.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/14654693500.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0d9e1b25f---tegepo.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/c762185227414aa8c105c7cec98cf454/8309340523.pdfIn PDF document text
    • http://espwireless.net/uploads/file/54744698671.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/zaveporuvopozirorukev.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/ab14a4f1ed2f0655da2e09e6977a585a/12293217579.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/fudepedopetodogaredoduxim.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103c93791fd6---46127057438.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/b1d0aa05a7b9406af4b2ccb7194089bf/22408765267.pdfIn PDF document text
    • https://aitalk.vn/upload/files/futiteruzotevijijizuxewos.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/43026433427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=sigelei+fuchai+duo-3+user+manualPDF 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_off0000fd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 11208 bytes
SHA-256: 7276c48b901b0cddc679248ea99ebd30e55605839bb3981f75283b07fadda8ea
font_01_sfnt_off00011702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11702 19668 bytes
SHA-256: 14e25e555bcee54db61edb96387ed8afce1217f6e86b28699771a1d364046730
font_02_sfnt_off00014a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1