Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a09a781af2be596…

MALICIOUS

PDF

91.7 KB Created: 2021-06-29 04:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5a6c31af406322772f17f49ba14ddc4e SHA-1: 0f2d97c66e83c88666c89a3de61fb7dd081d99df SHA-256: 4a09a781af2be5963c4a86b2df204ae59705f82f7527ece8bbd1049cce447a05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into phishing scams or download further malware. The presence of external URIs and link farms on disposable hosting indicates a deliberate effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://drafthe.ru/uplcv?utm_term=how+did+alexander+graham+bell+invent+the+telephone PDF link annotation
    • https://stef-nancy.fr/upload/document/45497913132.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607633bf283c6---jetizuzowoge.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/il7h615ijnun34187kao3bt1e7/rojimimida.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2717aa24ee---vivovemebidekugivajug.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/584d93956f307930a056c29268522f0b/2906861233.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/wizigu.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/34553746649.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075dafb71685---6421233816.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f54784e80---wenufuwavebexevawemi.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728032bb6e6---13645127024.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/b365c5c10e184c508a24c00d445368b6/53560300317.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160742df95dc4b---tizugevexalujukuwobuzu.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/s90p5m1cjiktdiu6d0lkjhaa1a/puwanexizimi.pdfIn PDF document text
    • http://ahchala.com/img/file/99098985341.pdfIn PDF document text
    • https://medtek.vn/storage/file/20687563644.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/kilos.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/59297df693385ba48f3fe03a207c0f0c/47918612360.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/49260334773.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/sewavaregunokewasi.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/19ddfdb57ddbcd75ab5c98743bf68d6e/83733321177.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/8oa7vaidovvc7lev56fhbetrg8/zugoniwurivowuligadibove.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_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 11056 bytes
SHA-256: b182f0ce9cae876c8cebdc5bb48cc32f98fbe9ca32c3d700e51a902eb00dfa60
font_01_sfnt_off00011989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11989 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001319b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1319B 17608 bytes
SHA-256: 1eb42c70f26f86849aa18cda1b597011e8bd23f4825a6cb04ec6070cfb64d4da

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