Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea3400d8fe812eb…

MALICIOUS

PDF

86.3 KB Created: 2021-09-01 09:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 8c6b32f2ffdf339f43b458d94932083d SHA-1: 9c5bee4a4cc8ec7ee4a0a01bb80c8afbf701b8a6 SHA-256: 2ea3400d8fe812eb0f96db239dada9c280107c1b14e14f412bee6530f055ecd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL analysis suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec4eee37c9---64473266433.pdf In PDF document text
    • http://ahcxdq.com/uploads/file/022347577779.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5585739437---tududugofomavewirozopanig.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/motozunodofunedixozatiwux.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/565b99e5535f40721b2c8358c05bcd5c/10103681563.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/mafiwopo.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1ba4b2d71---69636690222.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d49084757c9---70491094774.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/48028955402.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/89562455602.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/aolqrgdai413con1ioavtqe8ug/11937917721.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/75399775932.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/ladaxekupabunolizar.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/fevekisogivukirokibesus.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/b9a13f1a431a8417de94a766c9caab69/59494587436.pdfIn PDF document text
    • http://trickorsuite.com/clients/5/5d/5d84d12f6f4dfd10bbe5497c884a5f3e/File/41145195344.pdfIn PDF document text
    • http://clerus.hu/files/file/xadejosu.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085408a9ca7b---razitometofakiraluwol.pdfIn PDF document text
    • https://genericdiabeticteststrips.com/userfiles/files/texapitogujefafafuwunumo.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/c7tn7k153m6ig8qoei0fn0nvv4/73187691289.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/rasixesasufididum.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/fenilavidazukavigo.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/91209594399.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=bank+csr+interview+questions+and+answersPDF 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_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 10860 bytes
SHA-256: 9243f6eb1c3954e6760425944ad9928a958b0692484288b4cafa35f00ab11a8c
font_01_sfnt_off00010528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10528 17348 bytes
SHA-256: e46963858cec06d912afd2f15761438fe69981d4243d569691324ae33f7ea70f
font_02_sfnt_off000131f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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