Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda6bd0704abc8fb…

MALICIOUS

PDF

84.4 KB Created: 2021-09-11 22:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: db92b47e87d796147adcdb931ad92c2d SHA-1: db7024818270ee5b1140a73444dd5925425e4460 SHA-256: fda6bd0704abc8fb71b79a8561a4d314cc2c97e1dc0edcd325a823c6d0b38afb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://elandtour.com/FileData/ckfinder/files/20210904_99D08DF306B8A8E1.pdf In PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1612fea2e6f451---20767800988.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/7799198686.pdfIn PDF document text
    • http://consade.com/userfiles/file/nidanugoruwesipumofeno.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/dusofag.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/33b9f7485a8d241a100a5d94c28ad197/nalorixiradizoran.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/6815770617.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/dazemomuzagapuj.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133b7e2e96aa---lowetegupuredawomi.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132615e87730---bimemago.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/nixub.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/konetewubulidotepot.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/96630138062.pdfIn PDF document text
    • https://ka-base.no/images_students/files/32561900604.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/dilotar.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/wolevukuka.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/purasivukupesadugovitoso.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f944cbeebd---80505239532.pdfIn PDF document text
    • http://vo23.ru/upload/file/69548347164.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/donepikuvajibabazebi.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/gunurofugowagive.pdfIn PDF document text
    • https://12shio3.com/contents/files/jisagulakefubuj.pdfIn PDF document text
    • http://strandedtattoo.com/file/jisizova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=friday+night+funkin+download+unblockedPDF 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_off0000e45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 17756 bytes
SHA-256: 86dfd12b185ae1dae3f98d29e82ca939a6e62775a4996fa8ebb9aa826eeaa287
font_01_sfnt_off000111ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EA 11096 bytes
SHA-256: 306bf865691baf872fafdce3bcebafcb6562751d8eff2b30867672838db0eafd
font_02_sfnt_off00012b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.