Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e4f2ab6e1e97c9…

MALICIOUS

PDF

73.7 KB Created: 2021-06-27 10:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: aa4373975d1efb0ab6f1202c0c0b1d02 SHA-1: e7c3096466fe03c3ae744af5155da0bbb8b37713 SHA-256: 38e4f2ab6e1e97c973be67258115ed5838292190c82071941141dca611823e1a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for redirecting users to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a417a7cbea8---75136440901.pdf In PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b87ccff02af---sajikinixalawesi.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/vidisegubakosubi.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/kokatoga.pdfIn PDF document text
    • http://builderall.info/userfiles/file/82999127263.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/4697d57c7a55ac5ff76c2f32a4a58bb5/85016671948.pdfIn PDF document text
    • http://midel.me/userfiles/file/93469586568.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c59f1e2f9b---bubekapibewivewe.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/15118943428.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/0comiodkp2n0s9fq3l9mnhejdp/dikideramufotafalifipenu.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087d56b48dee---17287512075.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e8875e523---51319119760.pdfIn PDF document text
    • https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/4gr3b26jdklv00ahrs3i4nnn1k/76295252978.pdfIn PDF document text
    • http://absigorta.come/file/757458998.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/89293855445.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/5fa9ad135c5ca16996715c5a52cbce74/geturer.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/kirotuposok.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210626135725_t8v9ag.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/pitafuzovud.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/85894702012.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/boguvanojobirunasiduve.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaa2ad37c6---63223276432.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e16da5be5---kalituxivi.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/kafolufixatazute.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=wordly+wise+3000+book+5+lesson+12+answersPDF 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_off0000bf44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF44 15456 bytes
SHA-256: 80fca5bc7d74256c5990b8f4d870d5f4e066b72009279d041786fab80ba22027
font_01_sfnt_off0000e6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF02 11168 bytes
SHA-256: 8ec31a89d5ccd5b7813ea498da75b070ff0037c6f4275f86a4eeb19dcd0769cb