Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5606de37f9b1c4e…

MALICIOUS

PDF

83.6 KB Created: 2021-07-14 09:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cca610ed5da4d099e252526a49d56a35 SHA-1: 135f15ce5626517e81bf481140df7095c6cbb1e9 SHA-256: d5606de37f9b1c4e4effb663c94d74b4ec8f1c8fcda61aa3cfa59407e5a3cccc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/08861dbb3a6028dd663b0309289801aa/lonezifuf.pdf In PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/9b21807cc7c1771e3b14147d5224d610/95064760395.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a97d088b9d3---zudejewuwukimuz.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/7322c8441d2b7e3fa5af2f682e3de543/99944052822.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16099b7c3d87a6---90283896792.pdfIn PDF document text
    • https://irrisyst.eu/files/file/geburosetimulewakawi.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/92237058835.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/gunisunogagonoxebag.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/c2ef8e70d2a8903ae5a2249302819664/jegisasozixufegalu.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f2e1b1a765a99c1a06c64d589ce0febc/desibejigipe.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/kadalifixe.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/80890302091.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/xitudisumugafegadogavem.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608110f719764---47132833470.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/37572779491.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b205205f2---57161374476.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/efa3647ac2e8664c2566eef78e5fe2a7/wesena.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/4025786161.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/f6c73cfbdc52faf82fe2d02b465fd1e2/livufadunew.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/41998004016.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad3b8cecd9---75261177909.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9f7479f41---33635594994.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081088f0d8e2---voxufaguviweribelanavoziw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=pink+friday+sale+2020PDF 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_off0000e167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE167 10580 bytes
SHA-256: 7b832c10118907a329e5290835f80566693af6365e7d9b541f7bb3b1b30655c7
font_01_sfnt_off0000f9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C1 18204 bytes
SHA-256: 7d00828ffd0cfbd11b4dcf4c31ff3f6e759958a02e3d3bc0cd63f4fbd55da4c1

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