Malicious PDF — malware analysis report

Static analysis result for SHA-256 996d90968fcb671e…

MALICIOUS

PDF

85.1 KB Created: 2021-06-27 01:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 433f0a13ce971c7fbb7b9d4ca9fe78d4 SHA-1: 44fc5579e22c581ecaa065d4fb0116e4e11b4889 SHA-256: 996d90968fcb671e52e4b0549e4f18b55dce18bfd207a2726fb374ca280d159c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous other PDFs hosted on compromised websites, suggesting a phishing or malware distribution campaign. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates a common tactic to bypass security scanners by instructing the user to open a password-protected archive, which likely contains the actual malicious payload. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/bkchbocj0tgtlq1k4b518ld9r2/mimubagoteninoninotonagu.pdf In PDF document text
    • http://bestbuyfromindia.com/userfiles/file/15728204508.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/rs0atn9ugo9utrdmdueifkpb44/89970264829.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/74485198687.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/jebnmt1dn92npmdvp7e5pt15sa/55334390265.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/281c13d97f1bf37f4a3490cd58fa5d4a/mojubovo.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/f577cc07f561ff608b36d90307fcd90d/tifabogijesijutugixunepas.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796eed39caa---30697158533.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/99670693196.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/efc94e25b10a94a167e96ebc93bdf487/24689222232.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160730d4c0ed77---nexog.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/lelapisefa.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/kajararojosawam.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6cdfb3806---genodalupozugewosag.pdfIn PDF document text
    • https://unosms.us/userfiles/file/ratomapupadojini.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac09e89c9ab---53092027392.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210608235930.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/fb06fa9014a732c17c6c036723dd6dd2/tisirawaw.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/vapix.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c8a7d637c---zamivolijanam.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/wukanebaso.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/punakile.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/9f2e5634da83442c320496090cf81e84/vekosunixotimax.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/53063459453.pdfIn PDF document text
    • http://50wj66.com/clients/a/af/af9d65f11c1965a5434adcd4cd578f00/File/vejojorotijuxepes.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6f48c60245d629b20bc18d1585b07942/fokusizubidenajupoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+encrypt+a+pdf+file+for+email+for+freePDF 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_off0000e8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10102 17168 bytes
SHA-256: d534b74291a2eecc72645b109c0f880bcd4232712bb122c701740de135969e8b
font_02_sfnt_off00012dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC7 10804 bytes
SHA-256: 96e007b807003c7d4d9766348f0e16cdcddb1af4fcf7313678582756eb2fea50

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