Malicious PDF — malware analysis report

Static analysis result for SHA-256 a324f7168b2a5821…

MALICIOUS

PDF

143.8 KB Created: 2021-07-05 01:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 799a71daa0543a614b7afb7d2a4331d4 SHA-1: 89fe76241fdad0d2f0c1c6f9d1a492aa97ecc3c3 SHA-256: a324f7168b2a582189d68e26f2653a5619596a577394cd8d7c91d4597f3ddc0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users through deceptive redirection, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://twothirdsmajority.us/clients/38522/File/fazotoxipaxegamekuvoxu.pdf In PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094f1cc4bb78---fozatasisijakuduzawibiw.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/1tumap5idd8l9etp6plgunh8el/63455730663.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/6e20d9f11593e9db53c1a7d54895333a/tuxiludogodexofegonema.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085e4d38a02b---40290896866.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc44a07139b---77545570979.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210704114612_id0yvd.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4c557412e---92127648459.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c233af82553---2166893735.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/13331134469.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/60940210673.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/cf800933649ccfc609c0313dc878b72a/javafajakivekokudefi.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/559bec2a191d5be05772a633c0a93b70/damefizomibejulaxujetaze.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/rotez.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/4bb29bf88492b8343c7039dbd55097f3/kalavereduvusoluxijadim.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32f6bdcc92---29389188392.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/25a5902de3be5f1a01ffc0f5f286e260/kezaturumokiwisobu.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/kpl3jvmhh7ojks2fj4o7qtr7r6/xofijefeloxuninibu.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/defedanepeva.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901293a735c---8437733063.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7a3969b5e---gizuvapedujul.pdfIn PDF document text
    • https://bataretak.com/img/files/file/13406926443.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/17170719275.pdfIn PDF document text
    • http://logansport1971.com/clients/4/42/424235dfd0fdcd2d3cc2afd1e16bb83e/File/57123973695.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/11632231475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=list+of+fundraising+ideas+for+nonprofit+organizationsPDF 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_off0001d208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D208 18216 bytes
SHA-256: 5868f1b1590aa1e653d0c3ab3e6077a4afafe7d2cdcbe18d798273f35f30b6e1
font_01_sfnt_off00020082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20082 10744 bytes
SHA-256: 5f6fb449fda2bc1e19ae3dcf4e8c3fbc480168753bc08a097a69417c83dd293c
font_02_sfnt_off0002192b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2192B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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