Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba845f482c571e7c…

MALICIOUS

PDF

85.5 KB Created: 2021-07-03 20:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 89911418f0f40d5bf9a1efe3e028f0ef SHA-1: bb34788536c139cdaaa94dad30f3ac78b9727801 SHA-256: ba845f482c571e7c0e080a729be1e6e42da3b69f3b8f6ef3d79e9a714ec5b5fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or appear to be part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://esoftland.com/userfiles/file/vikadivasagenolujodimo.pdf In PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/13277454895.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/levabutesivuxeze.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/zutegabumovanedulosude.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607419fa105a9---55713088540.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/pelusezibananaguxek.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f477eda05b---4544864400.pdfIn PDF document text
    • http://builderall.info/userfiles/file/liguwezubebezo.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/ke83su8rbrvovbs0t5acu4ini3/50545786667.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/78722292209.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/70474374612.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7c7677a02---12211246492.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da16134462---31582457431.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/80454600379.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907dd5ce7d2---72419573041.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1609e598643842---xokigojutipufir.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/17527692897.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/kexivan.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/gipimawi.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16201058406212.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/5ma1mh8bm3r4vemvetcqas8rsf/sarutewasuzawuniragep.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c04fe8ba70676b585f7f0bd13188a204/21203567189.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/94087126173.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/qb9oqv2fjsg6vndc5kjsop69a4/79264029738.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/81794327687.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=residential+roof+inspection+checklist+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_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 16764 bytes
SHA-256: 95edefaf865c3c00d860432b88b226de2b515fff9d0400207dbdb4dbfc86ce0d
font_01_sfnt_off00011738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11738 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4F 10856 bytes
SHA-256: be320c4c8d2baac4fb12d318ed1ab6a39a562a3bca82c2048d65b885644b000b

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