Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f37540419d3932…

MALICIOUS

PDF

95.8 KB Created: 2021-06-27 18:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7691d428a230c81591f2e21fedea9775 SHA-1: b61d2c6951907074e0f9503a6d1eaf457993f46b SHA-256: 51f37540419d393238ca80fc76dfc097b6ef52d0688978ad63aa5c0c3340beda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these numerous external links indicates an attempt to lead users away from the current document to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://infrive.ru/uplcv?utm_term=pitch+perfect+3+full+movie+live+stream PDF link annotation
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/uretrll1t9klj8it15bs48gj4n/zosogexizexij.pdfIn PDF document text
    • https://hirurgija.me//files/46097790696.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfb1e34a05---kipavolivo.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/625ca9a583bd0dc816043ef85cf3a785/fibetitajugidisazusimoka.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/96649219576.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/910f5vpun11v2q4s3opj5v1kjd/xejodewovereli.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c609c5c8484---96723179148.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/030601473153.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/tawomobapepo.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/9c6686b2f2efe8c900b7a52c638d26b4/17023210336.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607781c904db0---14694177231.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/pasojagulifusa.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/divowep.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/46i1r09ogtie11sos8gral55h5/9361145010.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/12102086933.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/67952087951.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/lugerejazaluwerikesenefut.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/gilesanuwenuxowax.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/683668543.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a0deb8564---roxuluzif.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a94ffb5102---38772066547.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/kjgp7b7hlhqo3psb6koip3dbk6/8406406885.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/37285488164.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160baaf689ee08---muzilumizobefefasagarara.pdfIn PDF document text
    • 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_off000112c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C0 10980 bytes
SHA-256: 4c3f44e0aab91c1b2d16a748c5f4c7b05b960466e69e9156dfaff0f19c42dc96
font_01_sfnt_off00012c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C53 17404 bytes
SHA-256: 7e366df05a541921f497437cc7c96a85bea07fc20bfc3fa2be89cf27cc75a678
font_02_sfnt_off000159e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.