Malicious PDF — malware analysis report

Static analysis result for SHA-256 48893a19dff7df60…

MALICIOUS

PDF

85.4 KB Created: 2021-07-17 03:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 27c16bb805130f5d434de811fc22f7c8 SHA-1: f85f994a6587a1e6e64456771e667093f3695c76 SHA-256: 48893a19dff7df60ad446fabe07304c3768beabbfae77593e90caf36d5317559
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics identify it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs are likely intended to redirect users to malicious sites.

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://alnoorcity.com/userfiles/file/66457187110.pdf In PDF document text
    • https://ibeguiristain.com/userfiles/files/jofoluwik.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/goxowibolemuwa.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/45702516038.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609497de13e11---kevikakowirimudizezadopuf.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/tetisu.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/52212368126.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/69175199889.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160f1aed32dfea---58782458720.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/11888018522.pdfIn PDF document text
    • http://abpaluso.com/upload/file/69036537967.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/56772922143.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/67524946183.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/125fc9994d16adf1b534757d678030ae/77802470448.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/1b0466e6610dd1d863149627de06e80f/23765449089.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/nobogizejuxexepo.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/dq5mia7m0d2pmh5thg15h6f0ln/96041111392.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a6a77cff2954ef70ee048f88c84aa833/xiwugunekagazemelikat.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/e6ff7dfe9bb4f8a078c99f510e9c2c6f/butikumewidolimofodo.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/bfs6u7m1etvfpjhgv3apauogp5/kibiv.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/norejaduronolusenufoputap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=forensic+anthropology+salaryPDF 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_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001038d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 10744 bytes
SHA-256: f88d3b8162e5c6b16193caf26611861737230a69d7448cd1a4120a93bf2ac043
font_02_sfnt_off00011c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C38 17092 bytes
SHA-256: fc66aab1fab7513837d57abd091c7187e3886585ccf5ea1751ac4c2779ff5b9a

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