Malicious PDF — malware analysis report

Static analysis result for SHA-256 45cf4069ffd7a524…

MALICIOUS

PDF

78.2 KB Created: 2021-09-02 21:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0ea3dc75a60f286fdf720a0f1c42ecf0 SHA-1: c4d2db253a8825bae2f687cd7e408f96bcac9893 SHA-256: 45cf4069ffd7a524a6c7a94b6616a6195481c3221fc10494a0a054b1d01df6e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing or a trojan. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://enotecagaribaldi.it/userfiles/files/zefubufoloda.pdf In PDF document text
    • https://arhometutor.com/userfiles/file/rijani.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/nanorojov.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/22958384424.pdfIn PDF document text
    • http://thecobbfr.com/clients/4/43/4363d5a08aa72aedcf7f7d4dd0675897/File/19007343537.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/memodu.pdfIn PDF document text
    • http://dothi.info/images/files/90936318680.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/29096100759.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/famogopemimajujakiv.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/5754289776.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/nopovitupujosavalo.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/zufarenafurofugemawuzad1621136709.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729dca97f29---4676504027.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/bidukedox.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210705_CA599B140751067E.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/46160113410.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac25e4eb471---bolatiti.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d6542b2d913---lolegaru.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609482f22324f---45071076120.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/tigulufexuwuvuzarivulinis.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/69534528163.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaec9a58d74---4171544174.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/vejikesexa.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a1c8804e9---vanuporotezupekupew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=sample+of+restaurant+business+plan+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_off0000d0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E4 10976 bytes
SHA-256: 67eb3d2d393a649a9304eadf95512701df578833b058f38f46da96e04606f6fe
font_01_sfnt_off0000ea0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 15992 bytes
SHA-256: dbece782ad06ffdb86229ca9bbe4481c6cbbd9de8fdeb7f3a4f3c5dfee8f21e9

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