Malicious PDF — malware analysis report

Static analysis result for SHA-256 224b9c96986f4eb1…

MALICIOUS

PDF

97.1 KB Created: 2021-06-29 06:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6df777012dcd816ca2a57cbbb21c4cfe SHA-1: 333db2bc4837de78ec5af9081de07e0b1d1d0e72 SHA-256: 224b9c96986f4eb1af3fa80a2af9bbdd6ad9ca4fb4f6c1f204693c570ca5a81e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • 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
  • 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://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b005d9dad0f---watasekepikij.pdf In PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/7393330809.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a83c8b742---robisabadodeb.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/fevafezelon.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/bb5b28c1e9c7b41ee5acae10ec5a4c94/40207092440.pdfIn PDF document text
    • http://masonfamilyreunion.org/clients/b/bd/bdaf0a3c19eb5f10f0519c747c117e37/File/30228907186.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/90415170279.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/5e5k5k4qnmkefn0uqeaq0lhjkm/19697093717.pdfIn PDF document text
    • http://citra.cl/userfiles/file/92286706180.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaa5488850---tozofelugagokutosafutod.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/butodunulenefomu.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/4v2mtlm8ugjhllimeh0ogodr14/vamavosekulutosodesif.pdfIn PDF document text
    • http://akssert.com/userfiles/files/22155339116.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/nuwiluwe.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/07b1ad814abb45ffb7d0db51d8f1848c/41752940710.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160894ae7bad2c---999003928.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/bunuwopinarulivoforo.pdfIn PDF document text
    • http://bethanybaptistcolumbus.org/clients/75549/File/49873165158.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/87174158694.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3646a2e9a---gubilipavugokugegemuxorix.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb47d858d---dusodedaruwukejivenaf.pdfIn PDF document text
    • http://df-foundry.net/d/files/40607216180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=a+red+red+rose+by+robert+burns+meaningPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10301 17188 bytes
SHA-256: 3947ddf038b3b07d99345ece27b8d340da92f883b7716f0a67db19c0d56fa142
font_01_sfnt_off00012fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEC 10880 bytes
SHA-256: 2d014aab3b16b8a007d3d1089ab7579091f6f49a8b9429b49056637785bbd24d
font_02_sfnt_off000148e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E5 16204 bytes
SHA-256: dee6ec54591bff46356f0534ef832549fc7a3c54ec50f2aa2afdb2c4285f47ba
font_03_sfnt_off00015e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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