Malicious PDF — malware analysis report

Static analysis result for SHA-256 a441f55e7099095b…

MALICIOUS

PDF

95.9 KB Created: 2021-07-01 13:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 613fca5088d010938b21cc681fbbb18a SHA-1: 2bec71f944d09d2bec785dbe5ed61799e61e010a SHA-256: a441f55e7099095b47012c3d723d722a310b7ae04e9d71202754a34d353f95ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/7b545c63553f42b35f4b20b4091fc058/pabolivolefusazolod.pdf In PDF document text
    • http://primaneighbors.com/userimages/walisebum.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8cfc945ec---21823931421.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/afc750a509527113a0ca0bd21a0b6860/pojetesozu.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/vikowuzen.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c51db4ae09---satofozutuvipotivedoki.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/29312463017.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/1332d8a276bae417f8577caaaa2564c6/siwiruzekip.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/a80r8011lch2r6qrs1kontg8qh/87360253533.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1140ad4a4---fowewa.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9833c08ae---komidifumetod.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608161bfca158---26386834137.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/ea12105d58c9d8add0dd9e7ea7895635/xemejesojezakapejomenumuj.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a6703101---77987956270.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/7042900acebf952b1e9e3f176e97dbde/79382654406.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/5af0b2a5e1f89f061cd61179ecb51279/zuvapubaginesonegazu.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/27d21b2437602b2c38ae182d5518b75e/fedosalazuwikak.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///xelafagonamojebuxoteler.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160785685317b9---150293126.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/lodisuvusewalusivageje.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/labewapodokajela.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d096d1301---nawotomesopidulugo.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/lovomegefelikizatuwewiwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=next+cryptocurrency+to+explode+2022PDF 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_off00011104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11104 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12916 18864 bytes
SHA-256: 00b6729d43dee029cfba99c40243d1913a4daf9e1826deb2e5b32a734ffd3c76
font_02_sfnt_off000159f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F8 10620 bytes
SHA-256: 4f251dc48ddbcad2282d2a65fe69a1f39dab3534b64788a87507591ab4160828