Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc74a4bb45a736a…

MALICIOUS

PDF

270.4 KB Created: 2021-07-24 00:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d4579b55388e9a72bde58ddd9704bbf0 SHA-1: 033798a78e341cbda60f85fa14aaab1d247e3a32 SHA-256: bbc74a4bb45a736a9a22df8c4066914b48188fbab77f191b449c16a8978d45ed
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload storage, indicating an attempt to host and distribute malicious files. ClamAV detection and ML classification confirm the malicious nature of the PDF. Although no scripts were directly extracted, the PDF structure and linked URLs suggest a phishing or malware distribution attempt, likely via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9782

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.
  • 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://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/danulufarakelowimizib.pdf In PDF document text
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/77596301241.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ece90ec2d79---rafituj.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f10945fc4b---25191945012.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/q73h2ohqjc0uuhubtdv72v5c42/74963881439.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d80d07cfd29---veluzorogezolumagifi.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608681a023b2c---7223375906.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872be81f97a---50332579369.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/20277084856.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b420000a187---zonaxaniwotikij.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/k2k8mgi8c7nu6rjbjk72mkc37j/kuwosatogivifevexiperal.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8bb6797bb---896687484.pdfIn PDF document text
    • http://schubert-hh.de/image/file/savuga.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/62418040901.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/jojutolixodonamojovelebe.pdfIn PDF document text
    • http://grandfiltr.com/files/file/kedixive.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608dacf53448a---93356290016.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/88703959091.pdfIn PDF document text
    • https://bamor.org/userfiles/file/vekudovimefidimabemixig.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/d540d470cbc6967a2027331dcf046515/padakurifatupobobodemid.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/dowaruborawovevo.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/ca23b1adbf56103caca1c3a1a488beca/delejugotigidamigerit.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/48943851138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=informaci%C3%B3n+de+los+romanosPDF 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_off0003bd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BD31 24500 bytes
SHA-256: f3e5bd06b92681366c6b318e97c25e36636873c32f22e27a94e36ef47c1482c3
font_01_sfnt_off0003f883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0004109a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4109A 10628 bytes
SHA-256: 2f63010b7f7ddacc0acc2ea3b0c51adf5cd113612bd55034613475ccf3ea38a4