Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94ef479cc8a6614…

MALICIOUS

PDF

126.1 KB Created: 2021-08-12 01:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6c4ceaf7ff1fb17ac6da83e5d27cd528 SHA-1: aab648a4818a066aba4c210a1ce88a875da2a550 SHA-256: e94ef479cc8a66144c86d0b4c1b53998084b7c6d20b0e421bb669405bde64d51
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://actor-conseil.com/files/file/kisiwevimewafiza.pdf In PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/0feafa7ed56776e87ab7628ab2d1f1f8/kazuziduxujeneridu.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/67765075793.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/4mbscnigmfvgufbgfghqhfcpjc/jokusux.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/cd43ae82fcbebda11543cb2179ced0bf/38241952759.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608976288a140---42893471398.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16082fa29a0765---wokazodibexipip.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/gopirajolujetogetirage.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/forerumuvomolijovij.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/37416627054.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/nixeteketo.pdfIn PDF document text
    • http://turnyras.lt/Files/file/mowiru.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/2700672061.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/42804480890.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69a1d8ba25---73844548901.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742c88a7756---vijotekibikatipepimabako.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/01055a1529d2b2bde47d469fe44f27cc/63509271250.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/a057olpmmmpvq8n6dkbp6k7s37/togodedomim.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39cb366387---dotak.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/xuber.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/3ca0a4d9d236b40c008f8a5a49df6f7d/52417162206.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/28059943879.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4270a75b19---ruwojufofepeviperij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=angry+birds+transformers+jenga+code+free+2019PDF 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_off000181b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181B6 11600 bytes
SHA-256: 904de15fb9820ef727b47ee39a5219cecf8569a1c288d3795e52c356aff46a1a
font_01_sfnt_off00019d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B543 19160 bytes
SHA-256: 6921eb24d6fbf646ec4519ea8f03b5dc71cd273292d75770cfb96e645a986361

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