Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef9a4764b57706ca…

MALICIOUS

PDF

98.4 KB Created: 2021-07-13 21:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 80d975fba36cc028be7cf50622d06e88 SHA-1: 92aeaca91df84cb3b7fa94df9cc6fb752423c598 SHA-256: ef9a4764b57706ca7d0fcedb16dafd9f735caf8d96b89079aac96bc8873edae5
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. The document contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=dunce+in+tagalog PDF link annotation
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/a791e4dbbc14e46efcf3997c306100f7/jeberobezakejaza.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/ea3e4de5fd1ea5f9f565a118a3585b3a/49556392439.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/e5e5312df4004b353016bdcc6bdd8947/38814170706.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/jivexemigim.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb95e7ace8---vudasawilalokotoxe.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/29579cb57db0abe21f79863e3e853ac9/gufewerezudumuwe.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/11943490762.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607444d0b0613---99852015109.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/45190271285.pdfIn PDF document text
    • http://home-delighted.com/user_img/files/kirirorevejozudimorobela.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/123379655.pdfIn PDF document text
    • http://yuha.be/_files/file/46577259223.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160ba23e90ee83---pezuxokukupasavavusilex.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/68845979949.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/4592ba36740595f2b8eb200f782d17bb/nopebanusopizituzopepewas.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/a937ae5a70b7b11746caf825b10bcb5d/dadasidigagozag.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/fb27832c2691f784451476114ce925aa/jumijudodipoxuf.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/9198651067.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a314445e16---jowarikin.pdfIn PDF document text
    • https://iword.de/userfiles/file/vagelazi.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/nozaruxivajodexufex.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/4424d56b0e58ebd87195f28decee65ef/zuvinazanogaselukulex.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/63289109465.pdfIn PDF document text
    • https://mahae.hu/files/files/6181045433.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_off00011e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13695 17744 bytes
SHA-256: 022caf9a40051ded98874217966feb8d8f7409af4773f65d97e527882b60ebca
font_02_sfnt_off00016524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16524 10236 bytes
SHA-256: f3e9ee353b2c0d0ff379723f945e350189a42041aeb658acce252b0808a4a7e7

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