Malicious PDF — malware analysis report

Static analysis result for SHA-256 48109fb3374cf40e…

MALICIOUS

PDF

87.6 KB Created: 2021-08-02 04:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6d91e90485663a05833548d3ce21cf25 SHA-1: 6781a754493d106c21a87a9feff4d9407f8989f4 SHA-256: 48109fb3374cf40edf8ecd506daaa370a8681016a2109c34efff79787b081eb2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, many of which host PDF files within vulnerable plugin upload directories. The file's structure and the presence of these links suggest it is part of a phishing campaign or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e31f49931b---31113825468.pdf In PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/c693lbtfs7s7ib1ov9tnsd86q3/lemimevojoxizin.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/fopiguwutujotapufokezaki.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/a45ee5a2338bf130f4b31e622e3b95b9/folodatozam.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cc4363048ee---77873203936.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-07-20/edf25500cf83802038da2f117272af54.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/3f6p22gk2mj0bplkqdqcn2akv7/lowuvi.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/os3pipfq97h7j8qi43d6a1kid0/bojunifuzuxajimezu.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/nenuvizobobazikizadogep.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/7582750170.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/libidatinegusowelame.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f7857b6b5---lobedawuwawibunakisa.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/94732333401.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/72184765061.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/tn9nu80kros22tl5esg7qghp26/23644961814.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/79951773722.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/tatudasewaw.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/siviwol.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/jagesotutobofurolelifago.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098326c0b102---zumegofurogowoxola.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/dakozosagu.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/1759829477.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f33df4cc515---56715889804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+the+meaning+of+keeping+promisePDF 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_off0000f241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF241 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 10844 bytes
SHA-256: 47d204fbf78828dbb6d9caa8d2cf265364f021bf55e00d168583f9cdd6992ba1
font_02_sfnt_off00012337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12337 17104 bytes
SHA-256: 477edcdf0d5be031715269c26562af35765446ec5eb0421ad2762061005fd0a0

Open this report in the interactive analyzer, or submit your own file for analysis.