Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefaacb23b494653…

MALICIOUS

PDF

93.7 KB Created: 2021-08-18 01:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bb5cb4622cd66e91c6522d0530d0b6ff SHA-1: af6abb55592bfd15dd23265ee8f5caca9b4b8af1 SHA-256: fefaacb23b494653a7998a1602b90cdb5068499c4cf1eb295b7abb14e46b7471
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and URL patterns suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.2367

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.
  • 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
  • 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://garglob.ru/uplcv?utm_term=what+does+bulk+density+mean PDF link annotation
    • https://destockbaby.com/ckfinder/userfiles/files/fuvesedux.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/hq6gv3m1d2rg33aeo82rfpra52/92069748955.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf286d770b9---60577266539.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/53790552647.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/c6a358b716062f8ee121aecf6836c1a7/47369206958.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab807a72586---60362183916.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/wowapipofufixebekomizu.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/30509919202.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/84838567962.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f4fb05c4238---mixugorin.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/87744708889.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100faa1df567---4464742231.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee387e2e208---duforupimepinafovunajusew.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/21224297887.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/0e984b38d7ccf25891b1e3db224b5b82/nosavijovasod.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/hsbsrmc1pfbfm3i5vma4lpavu2/veludoke.pdfIn PDF document text
    • https://lanjutpt1.com/contents//files/99035209867.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609053ec525a8---41019292561.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/290906571470.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16095fe88d6f20---pejej.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/wejopozero.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/78864595181.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/0117e33ecf6d9b9867cd417f12a38139/7072561967.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf04ce8fe49---95272526489.pdfIn PDF document text
    • https://areicon.com/images/file/fuvewiredovuwobokukulo.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/zuxinawavi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F18 18808 bytes
SHA-256: 4fbbed14eef8ce69390a7500676ceae33f142da0da1a1676887615e3a1bf4533
font_01_sfnt_off0001604a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1604A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1