Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a17ceea85ee774…

MALICIOUS

PDF

83.6 KB Created: 2021-09-03 16:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7145e4470f4daa85e803ec5de5a48b8e SHA-1: 6c565e14100114fc380494b6c29e1383f8c3bdec SHA-256: 94a17ceea85ee7747d497fa8c7f820930d33c95e5cf45aa10ce67d7b1dddcb97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c986aef21c---pazewijadiwinusageverog.pdf In PDF document text
    • http://mientaytourist.com/uploads/files/96771423741.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160705d5e33ba0---34412480314.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/dapugas.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/f6a22a84c8541027239dac8dfabc80c1/98939532281.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/9656297995.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/nepukobupo.pdfIn PDF document text
    • http://www.asslar.de/downloads/27756806335.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/jidowadabusilanak.pdfIn PDF document text
    • http://mylodge-naoshima.com/29561382239.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/fc4e3e9f9f3089b5fbb538882c661647/82234532567.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/nikalikutak.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/37173429824.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/22090248805.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/59146422354.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/5e7ql655547jb0c01n47d2kb27/bogetab.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075df7e701ae---paluvekus.pdfIn PDF document text
    • http://innotack.com/userfiles/files/71604364474.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/ximubu.pdfIn PDF document text
    • http://skikk.be/app/webroot/files/userfiles/files/88862102819.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/26ef5ae4f0629ba99a2ba9536cc9e790/nikenup.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/52356287941.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/jogeloje.pdfIn PDF document text
    • http://bamila.vn/luutru/files/39845972434.pdfIn PDF document text
    • http://deauville.ru/files/file/74634748664.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/a8125e163b2d15d87d3b2b4e4f3a79e6/gatolitum.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771515d9d13---48326923220.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=tower+hamlets+housing+benefit+form+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_off0000e013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE013 18152 bytes
SHA-256: e51ce874fddd16329d00d8a44ff213a9a3e7db044638934dcad10419f59d18e1
font_01_sfnt_off00010ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001270d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270D 11232 bytes
SHA-256: fa46f0152cbe3069eea73cc16a4b32ff89c12ed56da62a5856827e5a9a85b990

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