Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de3b5bdca750e12…

MALICIOUS

PDF

76.8 KB Created: 2021-07-02 10:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 247f24dc3829396848fec2ac2321ffb0 SHA-1: 91ccb4aa76b7020e03fb5766a16744497532032c SHA-256: 7de3b5bdca750e12c5bc93a41913b72f35dd47545dd9a14f8ad0fc93a71a8001
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO spam or directing users to phishing sites. The document body is heavily obfuscated and unreadable, providing no direct user-facing content, but the heuristic firings clearly identify the link farm and compromised host patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/9664b9755d2f79239161eca436b44533/30798316489.pdf In PDF document text
    • http://glassco.ca/clients/9/99/99aa1728c1dafa3cf8773a75727b87c9/File/29312612416.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607856916be55---kovifosapaw.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/os0pnlnoc7tfs7n1u55u4e5j5l/lukagimatemezuxoraxifo.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea5ffacaa2---51441582334.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/72978be554ef57b35fa809d133394177/jetunolozimubuwupezox.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/jokapemorajubumod.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/judamovemuzuvewagozad.pdfIn PDF document text
    • http://judyzscotties.com/clients/1/1f/1f1ef5c9f72ce0e5bea5babf356718c6/File/69798674519.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/35968887019.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/gasabutanumuni.pdfIn PDF document text
    • http://abc-tel.ru/data/File/sixiropofe.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac59a8576c---50543695891.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/0310dc134cbb20cf59e75b3738bfa737/xumuxuzili.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa908476c51---11946696225.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/joxekegejadawidesisufige.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/o4u4ojgk12r14o6l1m2atlbi0l/fenigupojeduwun.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a8de655cf11---pepemeboxogopele.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/99303779495.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/9864283730.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c89a2d2c32---wavapomotutusakunep.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a3324000a4bcb6c6aaa280eafb75b76b/45010861844.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607573caacb14---kubotedomitekumesezozud.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609117ce3b873---40231201483.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/zokoxejuzapazopegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=half+lives+of+two+radioactive+nuclei+a+and+bPDF 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_off0000c4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 17992 bytes
SHA-256: 1fcd384d609f80a744b9d208e22c1fc3a36e14232b64571770274deb8312adcc
font_02_sfnt_off00010c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C33 10852 bytes
SHA-256: e1aa762f24c0b73807de255f0c9f3f6fce4417e63b24b6ef54f04e8d96ed4ab2