Malicious PDF — malware analysis report

Static analysis result for SHA-256 652b0e72c5f5ceb9…

MALICIOUS

PDF

97.8 KB Created: 2021-06-30 05:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9a0ac81e8b300f883b92ab47f76482b0 SHA-1: e61c257da42252911596006f3c9a14260d66e55f SHA-256: 652b0e72c5f5ceb99185d9c68ba8514a971a2b3c6cb4cba418340c08beb52df0
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing or trojan distribution mechanism. The embedded URLs are designed to lure users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/a03e22b2c84f865a1c32dee2a8d4a478/wukasojo.pdf In PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6a7ce3482---55399923412.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/77011516689.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd6d9c27513---31029912778.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d048b0d9f---81864258133.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c95809d2e2c---rupupejajimunevaxuxala.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/32516438973.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609474b3a8a09---9404109029.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/bfb3e99ea087d272540f618862520f3c/ruvawa.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/porofuvu.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/minadumadefokajorawitu.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/7e9df43b3567c259df7d1ce72ebbe287/53489051021.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/vilaselamiviga.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/pjo6f44dmml01dms3nih536p0p/18913308117.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/gezanajarir.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/mifet.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/23213827851.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/rh9kjqa8d6pafka76u5jeok6c2/xalelenukononilirisa.pdfIn PDF document text
    • http://hydrem.ru/images/file/wukuvokemube.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6a84e32bf---63651882947.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/joregobunuj.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/457dbccc7b974a676db73a59391ab976/72883178122.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/0f047b7b6ed2274bdbd383820d51ec85/tepojidoku.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/a98d4b56b30f6a1c01aebc4e00a487d3/wiririjinoxebojapipu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=when+the+saints+go+marching+in+louis+armstrong+lyricsPDF 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_off0001178e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 18552 bytes
SHA-256: 05aa85fdaf7bc93286ddae268f40549b13d6e36ef77b04afa689fc3479f4ee9e
font_01_sfnt_off000146a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EBB 10884 bytes
SHA-256: d2a4ac2a3d8685186b25ca6b0ba3615f21fb7f18f0d76247d367739d4fb1f5d0

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