Malicious PDF — malware analysis report

Static analysis result for SHA-256 9417c4c101b52b03…

MALICIOUS

PDF

74.8 KB Created: 2021-11-06 01:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 32e3f988dbfa9c0cbdf91a53571005b5 SHA-1: 0ad61bdc199bd55a629fe760d550f89d6d108a42 SHA-256: 9417c4c101b52b0302544959002fb654f16f35c1ca35b698eb2e22e611e40611
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a significant number of external URIs, many of which are hosted on compromised or disposable domains, suggesting a link farm used for phishing or malware delivery. The presence of embedded JavaScript points to potential exploitation of PDF vulnerabilities or further malicious actions initiated by the script.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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 https://fratellifurloni.it/file/tobuvajoji.pdf In PDF document text
    • http://qkmedica.com/uploads/userfiles/file/55674032867.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/xolujagapujulit.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/sazapewudutizemiw.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/37138870984.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/46511784618.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe29a85e98---xiloguvuxupuvakutun.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/kurisuba.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/3ckqfu0ktg9uets9369k5l9jhu/mepopi.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/lutisopivarajekojo.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/sonoxetinaposenidaxe.pdfIn PDF document text
    • https://sainaudit.mn/File/16747728255.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/80112872777.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/70441284062.pdfIn PDF document text
    • http://freeware-software-download.de/uploads/editor/file/ginugu.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/kobutukifimeti.pdfIn PDF document text
    • http://kahasat.cz/data/file/33300041433.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/94211248857.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/lobifevevawoxepinulopajag.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/nuzajifonopidunixovonuw.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/zuwikazijapovuforidari.pdfIn PDF document text
    • https://ka-base.no/images_content/file/gonapegogetujamelitutul.pdfIn PDF document text
    • https://promise-land.com/upload/file/sojemudesipifojaraze.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161807efc4759a---42536456897.pdfIn PDF document text
    • https://asztromiskolc.hu/ckfinder/userfiles/files/39182042148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/1hHberoKktI/uplcv?utm_term=university+of+wisconsin+track+and+fieldPDF 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_off0000c04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC04B 10832 bytes
SHA-256: 78d599e0a5bd23de2610eca58ecd10cafb7d0204eca69653b76863e36d49b734
font_01_sfnt_off0000d98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_02_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 17324 bytes
SHA-256: 52b080f27bde3b9fa016244a0d8869f17c17a92e305adda03ff11760e7170cb3

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