Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c062f9466aa410…

MALICIOUS

PDF

79.0 KB Created: 2021-09-05 02:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 56e375beff4cc5b919ab077924c8f3f4 SHA-1: b3c57f4b7cc9d985050bd8b80040db89230a5fc1 SHA-256: 59c062f9466aa41001ab98eac787affc675978c8c759123f498e7a5acc831e82
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the PDF structure strongly suggest it's used as a lure, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/ea52c7aefdcad6e3e06e68347cacb86a/96043170431.pdf In PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/1ddfn5fhact4ev506cckvo96h2/tisevimifewizixel.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16113986d022b7---43423520595.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/dipusikaxudotigivapagad.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705eb12ddad---42812417679.pdfIn PDF document text
    • http://airfa.it/userfiles/file/daxavatizonefaduwikosor.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/vesavuw.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e67227b5e3---veroboj.pdfIn PDF document text
    • https://www.almuhja.com/ckfinder/userfiles/files/dozefifujilovokarumi.pdfIn PDF document text
    • http://pratiklinik.com/img/userfiles/files/noropasetepa.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/a294e0121e3579a6dd1ae39d4a032bbd/raxipu.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/gibadefewijukanisafud.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085902c1ea5a---93323202906.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/59f17dfd777baf65aaf057cc10185976/76234214972.pdfIn PDF document text
    • http://zuche0551.com/upload/file/ninulojusowivizovomuje.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/novuruniga.pdfIn PDF document text
    • http://cga82.com/admin/File/156726324.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160843d9a68ca1---13434557264.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c6830784c15---3127800037.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/bajesozumejififeto.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/zonagutigofafi.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/33206955099.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+compress+pdf+file+size+in+macPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD030 17348 bytes
SHA-256: b24bf143684f76f0340a9c34a59536b1826c004ea7007119d8f7e1de32894732
font_01_sfnt_off0000fccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 10916 bytes
SHA-256: 5e972fc1e733b7e766bd6c9e61e0d23d3d66f547a48ff40aebc5c0cc117e699e
font_02_sfnt_off0001161d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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