Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d45f59c65f450c6…

MALICIOUS

PDF

85.2 KB Created: 2021-09-06 10:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d064ab763c3cc4522b7355e18b488624 SHA-1: e8f8e23c2507425343f9a77d06d2fa9dfdc36341 SHA-256: 3d45f59c65f450c66754639c6502631f536fdedf327f4979870ee60156cd63e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites hosted on potentially compromised or disposable domains. The embedded URLs suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160beb34292807---93741209306.pdf In PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/73286241060.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/24168033090.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/foxuvoki.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20210903_115721.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/99sekmg574hkl09i7lmbd0sspc/duxis.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f168379ea---jefibuwivijefunaziv.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/bugut.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/5f9c062284eeb77b4eb1e2d6cd840ce4/81083382051.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/zapetunabakadevo.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/890ea0f475082e8594881c454907cdd3/filidaf.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/numasemebukedapitel.pdfIn PDF document text
    • http://letdentalab.com/img/files/jizitodoge.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e4c671a80---gabizosis.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607d73260ffc8---kelozomosipuwusuxoxe.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/u8c3q3grm3asu2n2skbmlharev/82939928179.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/82159364807.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/66946950882.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae57547d3345078b3f5f58b1eb9ad7d8/11689023402.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/5b5660cc7c59e9ab841dad94017bad49/xisexanuwijix.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607481e996fe2---pakiru.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/51068396916.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=hp+elitebook+840+g2+user+manual+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_off0000e2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 18956 bytes
SHA-256: 44c7ba053ee3678c27dd80f308a320af2af3649fbb95b31a1ab05a4afb7d480b
font_01_sfnt_off00011391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11391 11692 bytes
SHA-256: 9d793e35f310bd7032136e0eb0a868376ef55c6cff8f8a4089b814914114f78b
font_02_sfnt_off00012f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1