Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3280cb3c1e1f92f…

MALICIOUS

PDF

93.0 KB Created: 2021-07-14 01:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 97047027e77ee1d9eb892e8e1457bbb5 SHA-1: 66b25076f9d441a4a35504d686517f9847ec89a3 SHA-256: a3280cb3c1e1f92f2eb099ff7146dab0aacc335020610da9dea02793f8041dee
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting it acts as a lure to redirect users to potentially harmful content. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crysiq.ru/uplcv?utm_term=deadlands+reloaded+players+guide+pdf PDF link annotation
    • http://kielcenoca.pl/files/file/25960438838.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/bvfv7cfsj0pnjnq09ima7u4e20/koxamigavowon.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/joarjqe1od8ofjmj24pmh2ck5t/pirigiwivuluzisomalibu.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4f3ce2b78---46683604470.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/2ccd02caaa1997eefaad927e11216322/mepekaluripusut.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/5pan0liio4usr59s3es65uotjo/xilujejejodejuwixilanitab.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9b43cb452---94563657850.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607515c866617---faruxixofibuxulo.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/48234775230.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/d7efa3280e19334711d80880c7de43b2/98420277852.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/54648971761.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/t32948of7jvik5hkp4eb19v414/gimagewixivomu.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/7712312763.pdfIn PDF document text
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/gededomagaxevaweluvo.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607bee9692753---pibivegolusajijetefuvaf.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a950b178---65151468941.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/3e93501007dce612dec0c97a5dfe947d/jutudojawo.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/tarifiloxivuxunojuwavevis.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/95066833666.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa026ed84f2---70157546279.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/dabiseleweruxodagokudidoz.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/jevubasime.pdfIn PDF document text
    • 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_off00010770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 17880 bytes
SHA-256: c852f01a5be5545cce5251b6a05ffa441721749f373ecdeedd757e80eb7c42fd
font_01_sfnt_off000135f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F8 10788 bytes
SHA-256: 8df00dabcc3cc198838116907228a462239b74dd8cef66f2f9a30a563eb14b1a
font_02_sfnt_off00014eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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