Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f52f7dfa6c3e6f8…

MALICIOUS

PDF

76.4 KB Created: 2021-06-13 02:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f7860c5358425242c40beeda4e53b72a SHA-1: 8fae05363587e54834ca0ef2219fb35c79ff4616 SHA-256: 4f52f7dfa6c3e6f8f6010953cd652aa3927971db82ef4edabdf011ca43dd6b06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains a search query related to 'Miraculous season 3 episodes in order', indicating a lure to attract unsuspecting users. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9736

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://nomylo.ru/uplcv?utm_term=miraculous+season+3+episodes+in+order PDF link annotation
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/pasejodofodavupazesudile.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/005214fbc7daf10f9e4422007ee31a2f/fufozugojetogevawiki.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093ff5915a35---35002461878.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/81188467281.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/653cdd686ff2142decb959cf7768d8bf/83987133506.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/melefigimomaxomipelokogo.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/242afe6c27cf1c84ee061a772df5aa96/19798747843.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/4fb972a4bab722ac12a7b77e7842d18b/naxipiremepaf.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/ed4fp1hqespjsc74c91idk95rj/22832545889.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac19a5ddc76---darewozojofunava.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/4eb841e188bf5eed00b40ccff9041362/36119059093.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/suwosominubib.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0af599c62---31573026251.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bafedd27b---97661879993.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/31421837462.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/12024720625.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 5236 bytes
SHA-256: cd542fdbfbeb6799bd6eb0b6e028a8c543f0774f12f8c79bd7a6f84921d7c7c6
font_01_sfnt_off00010a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A37 11256 bytes
SHA-256: adbe5e047807775eb091e9d8de73b18ed333aa6e9f0bb39156c1d820656b8023

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