Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab214731b558dd6…

MALICIOUS

PDF

278.8 KB Created: 2021-08-03 05:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1918db3f7e6f1285880ac496046db570 SHA-1: ca936cceb1f7ddd2ab670e67c9ec3572da6ac6e7 SHA-256: 9ab214731b558dd6b1258c5d2965c85687bca13f62dce044bb40011683713d48
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous links pointing to compromised WordPress upload directories suggests a phishing or credential harvesting campaign. No scripts were extracted, but the PDF structure itself facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9099

Heuristics 5

  • 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.
  • 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://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/44797cb82bad6963655a90e31bacf6b7/vijedeb.pdf In PDF document text
    • http://tizianaiberti.it/userfiles/files/21095208568.pdfIn PDF document text
    • http://mayjack.com/upload/files/nonajokiwew.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/bb9a1bd6c21103d5a3ffed5059e06a26/76995802740.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607faeb0c7a5d---29785638473.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/7742473172.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/45f024458fcc0ed9f0a0786221a5265c/zesiliz.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/fanoperagirojekawizi.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/1ec469ba59fc7e9b7ae31f591a16cd00/wifaw.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84ebfd5952---zilefevasamadix.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/dedixapanewud.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ae3752200---luwefalivewufenigoduwupoz.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a01f173cdf---sebipeza.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7432a5c470---82911427752.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/81134639909.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a921c191859---sabizavupodosun.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/fexifafo.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f17d47e7e---98507741981.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/sazipegitefalolesu.pdfIn PDF document text
    • http://www.yt333.com/userfiles/20210709/file/1625838187.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/babirifi.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b38e491512---sojalemepepiri.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7b24ae2ea---34988539318.pdfIn PDF document text
    • http://ipublicity.cz/data/file/97521772951.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/37365628625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=exercice+exponentielle+et+suite+terminale+s+type+bacPDF 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_off0003e339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E339 10972 bytes
SHA-256: 369346ef01f7c3ebce3eead32763d2ca65dab056a4854a3674d4e654ebfdee53
font_01_sfnt_off0003fc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FC86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00041498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41498 21768 bytes
SHA-256: 6c7507d0d631500f77ac97f185bf11f727517749d0caa3f4bc8289ed0e5bf02f

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