Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74d62ad056b6f2b…

MALICIOUS

PDF

75.1 KB Created: 2021-09-04 12:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e6b97dc5b720fb9845be2925b05657f3 SHA-1: e1fa7c34cacdcd418fd08b3ffd880545aa0595af SHA-256: d74d62ad056b6f2b34afe7d37a1160f259d413372e4cbd5b7441b8d62c961713
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The PDF also contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing attempt. The embedded JavaScript likely facilitates the redirection to these malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://kozhikodedeaf.org/admin/my_files/file/minara.pdf In PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/bq8va4sc0ht07jl6hjct56tp47/mozesipasubu.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/41908934454.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076316c9b8d3---58271736978.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/nejanakedub.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1608537f3a7121---bunal.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d67rh8c36ed5ncfaetcg2fna6/93397563104.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/30475201689.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/19397085788.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa3485743b---80358966385.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/nokepowirodusirijet.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/jeraxetozupewiti.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/27320168203.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/18bc6db258d9cb4a164ae86782061bf5/medaxanepes.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/14600301940.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd8fe5c74b---vezuwugovenimupime.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/7151b39e7289da140cb739db8aa9b71c/lopaworajifugejod.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2415ce22a---zepebavavipen.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/xekibel.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce06c0b760---57495517179.pdfIn PDF document text
    • https://ottopianos.nl/files/wodikomavaxezesisew.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3d2946c9e---vawogeteneni.pdfIn PDF document text
    • http://prefinancovaniehypoteky.sk/res/file/95454201000.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=division+of+decimals+worksheets+for+grade+7PDF 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_off0000c209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC209 11220 bytes
SHA-256: b1f2f25ba23fa25101f4a10286d65f10ae54cc579244200cea67f8d0c87510c2
font_01_sfnt_off0000dc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0E 16668 bytes
SHA-256: 4e6ead9066f68a8964788e7937ad69bcb06a7a54a564f80d44ed93a3fce9df80
font_02_sfnt_off0001068c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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