Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0873e21428c5ae…

MALICIOUS

PDF

170.4 KB Created: 2021-06-28 22:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7a95bf6550e670dbc0ca020f300b5b60 SHA-1: ad3ac1dbc051e7f398c9b6b60b85910fe1ed842c SHA-256: ed0873e21428c5ae07768e3d8ac84226a3bed7f1d52af31b6f4f4f582e01b58c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, directing users to multiple external URLs, some of which host other PDFs. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document attempts to trick users into downloading a password-protected archive, likely to bypass security scanning. No scripts were extracted, but the PDF structure and link farm behavior are indicative of a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/c9ec7afaf2da8c8ca4120f56134336ab/gewafufib.pdf In PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/bufofit.pdfIn PDF document text
    • http://didopack.com/files/jexelezisasugunomok.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608550c325029---jivotu.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/miraz.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc6dbe389---mojedosudititifu.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/4pbp2nnkr339la8fi91i0pevbn/fosazegagonixu.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/5b89c1f29d0b7abd240028c3c749f355/witik.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdd982f039---folopujamawasefilun.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/9c59c273537ed9ed47b00eb7c08aa840/10445343993.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d27fb4619f---bexixub.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c0e84aad0---47433503040.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78db243677---dawitawunubivupawosiburo.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/22126a25a7f040368c04d5fc4cc617a1/sewudufebudukafurenadanin.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e0c607fe8---57720412767.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6459c9aab---41248603103.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/35248379007.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e906c33374---gorovajudajo.pdfIn PDF document text
    • https://heyratacademy.ir/file/27612416984.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c538463c6---61097992988.pdfIn PDF document text
    • http://relatives-united.com/clients/75139/File/68680923667.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094076cb0653---lewedurutogetidafiga.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/liwigavuwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=microbiology+an+evolving+science+4th+edition+pdf+free+downloadPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fa672f808---74714982889.pdfIn PDF document text
    • 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_off000234cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x234CD 11376 bytes
SHA-256: 9bed242e95a80198b172b3599e7998f9e9f1cd1ba3bbc12265f97daccd353b09
font_01_sfnt_off00024f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F42 19440 bytes
SHA-256: 07a8bd0ab4cc01619fe84234805b199976f2852d5201de72de6e6954d9187735
font_02_sfnt_off00028304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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