Malicious PDF — malware analysis report

Static analysis result for SHA-256 f424bb2a8bbeab4a…

MALICIOUS

PDF

198.1 KB Created: 2021-06-29 02:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f178440ee2fd7f13ec2a559d50db2cf0 SHA-1: 808260a18da7c2cf5cdf7c39d3cd228338e67ae9 SHA-256: f424bb2a8bbeab4aa1005e7dc9f0e4338327b636a7755a5576fdbcfa653e11de
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 for 'Pdf.Phishing.Trojan'. The presence of a link farm pointing to compromised WordPress upload storage indicates an attempt to host malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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.
  • 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://mindentudor.hu/userfiles/file/savivotajawafuxoxiv.pdf In PDF document text
    • https://hirurgija.me//files/sagedidedoxox.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d2392f68a---58824262079.pdfIn PDF document text
    • https://energooptima.hu/upload/File/vakowedarikabujira.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/zafavesutugawibuxulaboda.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/5c309u42j3kgirb42kjntcq6u4/62636789693.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c61488173---87668781617.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/994c4c01972ca67500cb436e08ae9f9c/14771055552.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b617506f7---58601734981.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/geloketenesom.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/5ee18704266288ee1faa9e343216cf85/sugirirusonil.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077572a650ba---72441370461.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/22465791462.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab2ea37fbe---jukowadusizunosizaligola.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d224858bcc7---71933292673.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a06f9a2933---54654891152.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/dezukiwusigib.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d82c07f30---fapabufejonalepukuruv.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/1858003834.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/zidutigasivifodifomorev.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/9f714f0dd54e1fa62a59d5e73e99333d/64506773145.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=genesis+6+commentary+blue+letter+biblePDF 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_off0002aa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA14 17712 bytes
SHA-256: 3fb087aa61bda830b01ec155beb8254e3fb491351cae0a895c48720bc94f1f12
font_01_sfnt_off0002d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D88C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002f0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0A3 10952 bytes
SHA-256: 33fe1a2152887197f9e78f0173430f8256238e76b9cb8f3fbb833c2016d60dd5