Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ba6c5fe90f04e0…

MALICIOUS

PDF

97.2 KB Created: 2021-06-29 21:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c7f6acc95d78585e66566b260b334909 SHA-1: e4752dea41f2209ed4a7aabb4297c856d87945e7 SHA-256: f5ba6c5fe90f04e0c038e40f043877850b804b42655cf9002d36733ddb783f0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users. While no scripts were extracted, the presence of multiple compromised host URLs and the ML classifier's high confidence indicate a malicious intent to lure users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b330823f93f---37032901462.pdf In PDF document text
    • https://usssecuritate.ro/userfiles/file/gipupetifegisovekotisi.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/2f66fde9ca978cfcfbe3b1c2d1633baf/71053741219.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e6126f6a4---58623321203.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/85b037bdea1f3ddda9033425f80aeeeb/gigidumazuxezesesaf.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/vejiwigi.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a2a79bd1d65e8df408d1d5a9e8fedbfb/nugawiseb.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/79092586853.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/2d5018e77337661322808875506e1cab/18725261861.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/puwurinejuwitutekuzoziv.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/60004703867.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/95713918283.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/2iu2jl357sft01oq0p28v3t7te/kupigubosafiverozeweko.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/cce6f4e9e9fb316a6c0bdb751f84b5ad/82162253759.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/13855743014.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/98b370903fe8bd2d233e746d2470cdbb/44703424595.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/73b7c759046d90f7b1da0d1d9dc8cd28/4892473896.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c25ab36ba---pixajizavufutotenefik.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/71e1f39f99a3c6996ab8ebf8d20d1094/jerifulezu.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/7f705e6f18dd9c722b6acc1c1409cb69/nadigarulogijinoxujotin.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736aa7989c0---12421552280.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a7384babf58---27674607458.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/fedosabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ring+of+fire+cod+zombiesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD3 10760 bytes
SHA-256: 9bdd3bb9d0b64596d5e52f623b3e482228bede604f0d0c6aa055e412f6da5c34
font_01_sfnt_off00012652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12652 17900 bytes
SHA-256: 01ed04c8af8b01617b1640948bd02ecd3ac79fd678200dc63338b70adad02feb
font_02_sfnt_off000155dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155DD 1948 bytes
SHA-256: b033f7fcbcd390b2cb396fbb5f03ef01f7ca9afc151f9d9df21604321f961cfa
font_03_sfnt_off00015ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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