Malicious PDF — malware analysis report

Static analysis result for SHA-256 1026d39802c5eb50…

MALICIOUS

PDF

91.3 KB Created: 2021-07-19 23:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8faa2646b0159c38e808653bc7df05b3 SHA-1: d0f65e744394a7c6668c7e14f5ac29fd17c8f09d SHA-256: 1026d39802c5eb50b9a2830247124c210da4361ff056917fcba400648f8c80ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, specifically leveraging formcraft plugin uploads, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afd48547385---80831984607.pdf In PDF document text
    • http://fundacionecla.org/resources/original/file/60530736797.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2457c787---17273712026.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731efa9bf2b---66512379120.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/92616915107.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f524c1339---najafasopibarodosetebudu.pdfIn PDF document text
    • https://vieclambanhang247.com/upload/files/kixidosun.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2c1d80d9c---tatuto.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cab24b9402c---21017811432.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc5d06105c---gomexasunuloxipotubixawir.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775b4fa9208---vutofije.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ot9udrd3a9105eu5s970msdc03/94119783549.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021061601554470554.pdfIn PDF document text
    • http://servmed.net/userfiles/file/88542706055.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16075d58446a82---72998522681.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/taxefijamovilupituzazad.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/99028020257.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608da4946d5cd---gagalebisitodufiwawaxep.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/jufobu.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20217101030211873.pdfIn PDF document text
    • http://wphs67.com/clients/9/95/95f8299e8098c1f2c85aab0f7ead5e97/File/41471292395.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/p1mig2l9vpbi3dbkim1j9m3shb/50676226517.pdfIn PDF document text
    • http://midlandhigh79.com/clients/866549/File/27529818777.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f4004c5c5---lovedawetanujun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=download+cv+format+for+freshers+pdfPDF 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_off00010167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 10944 bytes
SHA-256: 424d9a8473344f6709ad4e338b467a36f7d8f7897d5450fa712b573b44a5da96
font_01_sfnt_off00011aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA8 17272 bytes
SHA-256: 2f5b3d4fb8440260ac0451635b78ff8f36d92168698f6d931f2a5ef2f70b7f6c
font_02_sfnt_off0001479f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1479F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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