Malicious PDF — malware analysis report

Static analysis result for SHA-256 4404e324a07803d2…

MALICIOUS

PDF

105.4 KB Created: 2021-07-19 17:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7dd9b62ce518456569a22438633bbd71 SHA-1: 90f7b23cf5dbbd5d015fa38bbacf41af8356153c SHA-256: 4404e324a07803d235f40090901379ef28bbd52138500371d8f127d763616b2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous external links, many of which point to compromised WordPress upload storage, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and appears to be non-readable content, further supporting the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

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://dermatologie-chamonix.com/userfiles/file/berolaluwojepukamen.pdf In PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1b9cad9f9---nozen.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/gokamupugotokopevu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/tt40uou5hr7ptt5q27hat9qiq7/zonemamegorajezadirub.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160982fcb421c7---jisinojefisirofizebejibo.pdfIn PDF document text
    • http://seamacros.com/upload/file/remufovosujinu.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf7eb5da72---21920045449.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/fe425f770ed7bb363a2db9bed27ca892/bixomugovodekanupos.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/j1k6m19kvjb8nekst2c5apu2b3/mikifazinojezefoguwux.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/c65b9ab3798188a87f7a4f654dac4f02/94870875281.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1ee83361---34429231856.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/6doobeuqj0cqf1usljm6158723/tepuwizajeb.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/ragukidajefe.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607cec0ccc71b---marolidozifuzefuz.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/7d7a8f8b67641bc97cd8ea87a3af68d7/lokab.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/e3aa3dc240089d832a5a162bb104ecbc/28835243583.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b184af30c7a---31828299995.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/fekogatev.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607798b2d5874---jitoxemaloz.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/37723485113.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160baa99444493---13530429789.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/vikupojowo.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/fc757321ffc12d51906cd030b7bc0d87/72363101352.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021053005300349.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/76127706774.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=perspicacity+in+a+sentencePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011f58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11F58 21872 bytes
SHA-256: d0a088c2f785ebd8a6a65793ecd79cb2eb08e49f143e3132b8108e39dad854c1
font_00_sfnt_off0000f781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF781 4308 bytes
SHA-256: 070d2e808473035effe75d5f9af1e046217df9d28ae9c5c877603f5e838e2271
font_01_sfnt_off00010747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14694 10316 bytes
SHA-256: 7be94c40d810b8337e8f03067d02ee6d070252c14af51d0850c6fcb27c83c4fb
font_04_sfnt_off00015e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E03 23628 bytes
SHA-256: 6b5399947fbf945435d37d85167a847b5f8acdacc965da17dde8cd9815f56741

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