Malicious PDF — malware analysis report

Static analysis result for SHA-256 57583a2e2bc62e2b…

MALICIOUS

PDF

101.9 KB Created: 2021-07-08 18:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 65eee2762736b532b976197ea6d50434 SHA-1: 159130cbf9aa1a9693c9ad5345736e89396d0eb2 SHA-256: 57583a2e2bc62e2be84c3b2e387c0af7a5ef08bfbfbeb0da2bdde6d3a62c2752
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF that contains numerous embedded URIs, many of which point to compromised WordPress sites or disposable hosting. Heuristics indicate a 'link farm' pattern, suggesting the document's primary purpose is to redirect users to external malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://a-1commercialkitchenservices.com/ckfinder/userfiles/files/nedevidozi.pdf In PDF document text
    • http://www.halpellet.hu/userfiles/files/82743405503.pdfIn PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/2230649270.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/vijazekijetavisig.pdfPDF link annotation
    • http://babamoleskine.com/files/file/kibanarafadosuwos.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/94675411084.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/disixodokuwugexoveladot.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/bebhetp6p7t65g8tvt26o1dt01/72764676943.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/328fc14e1da96bcb2b2a3670cefef2c1/bojajiwegapefazu.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f6255fd74---66495376421.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/8d3da4ec11f4fc0c4ab6cbbae8e61a39/nuluruzibozoxaxaniw.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/47585aa5a01cb3e724e13f32f9dc027d/16119576494.pdfIn PDF document text
    • http://www.celso.org/download/begufuvafunimo.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/poloxuwimuniwikizoxekobi.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/tewajekupifilaminusabif.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/19d3j3cnu0le95rj2gptufmb6e/84099022010.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/wolasidizifajidudijem.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/43086810149.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/0aeca92pf68lr0fp6p3bppfir2/83908088951.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/a6587cf9825d2f9aeaffbf4b886e90cc/tomerelixazoruwipevulalim.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/jud4m9pgo5cjenfo1jgl7vskn6/raxibujidesuzoxuwad.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/1f684ca1c9b9ecb9b81d0dbfa68dfaaa/bezujenomulesonegup.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961bb64efe4---66957229481.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/73084214983.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607282154f0f7---dazirefixapuzef.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/46e50118d4aff737f8ebad6a7c3d0590/vowupudowisex.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/str1ciso6p71u76l5ebrjf5v28/60512250535.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/211995882660d1faf6536b8.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=jungle+book+characters+bookPDF 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_off00012b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B86 10740 bytes
SHA-256: a3ebf6768dad5263256c26595f64155a58ba794d64f11147d7f4007451164797
font_01_sfnt_off0001443d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1443D 17352 bytes
SHA-256: 8176dc50838818037c13ba41e6e54e6c15a53ea517a7ba4f5a4ad4717fde2a06
font_02_sfnt_off000171cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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