Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2f36c754db3eb5…

MALICIOUS

PDF

90.7 KB Created: 2021-07-04 22:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 47f83451ad1fa3ae95378225f10768e0 SHA-1: eba39c89209b51d8c90a55f945bb7370820ce8e6 SHA-256: 0a2f36c754db3eb5b57c3272f4fc0eae7f4392f48718b1ecba5632db998f0034
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The document contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a phishing or SEO poisoning attempt to lure victims with search terms like 'toll road financial model excel'. No scripts were extracted, but the overall structure and URL analysis strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=toll+road+financial+model+excel PDF link annotation
    • http://hongdanhaudio.com/luutru/files/fojolijidobugikanuze.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6ec9e2525695da527bf412d4aca0f66b/petadelidovidawazuse.pdfIn PDF document text
    • http://burnettefamilyreunion2021.com/clients/867108/File/dinegorozunobajodamiwegiz.pdfIn PDF document text
    • https://ubitanduk.com/contents//files/sufexemijuj.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/47737341962.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/dekibavoxadalisudedur.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/38793287117.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609484c5629c4---jimate.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6fb8516a8---xukalefimejavatimurolinut.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/didurexolorepuramidebalov.pdfIn PDF document text
    • https://t2sc.me/userfiles/bonezuzutelo.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/b3dedd94fe3074aea6312405cda89eb2/pewadisipokum.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pmniea0vsf0gkuksm5topc4kr3/91080112279.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/peteletosarupujawopoto.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/seravevoxunap.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/fuvuvaruvom.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/210bfd8f76b73010d182bdbcbb609439/22729288910.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/1ae4f5a69b64938be95570be8f0944bd/patubowiwamegurozovav.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b931de20da1---rotojirazikelizararizik.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9590589342---84664603379.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16090410de2066---lipinavaxuxeteguta.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb3fc2758b---zikas.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/17338104497.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adee8d80d2a---debimigiso.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0d6a0a7e1---20519182502.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_off00010129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10129 10436 bytes
SHA-256: 39279f1abce377f09693c009ebb37c1aa988576910ef85d5f6f57925dfcc219e
font_01_sfnt_off000118bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BB 17124 bytes
SHA-256: 23e16a20dc896fed01a7a08f492a003aaef65763500920fbd96b0724d1d2d702
font_02_sfnt_off0001456d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1456D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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