Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dba28a9ce2e0a8c…

MALICIOUS

PDF

85.3 KB Created: 2021-07-07 20:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 18415c93786bf93afa27cd590882ce3b SHA-1: 0bb8788b5db02edae8ae506275cbe9aaaa3d1437 SHA-256: 0dba28a9ce2e0a8cefc12285fd2e8720beadc84f6a9ebffdcba5a9b9b063d884
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious actions within PDFs. Heuristics indicate the PDF acts as a link farm, directing users to multiple compromised WordPress upload directories and disposable hosting sites. This suggests the primary goal is to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/8ba8d17dd41f7d3e42c549a3a11c8838/deben.pdf In PDF document text
    • https://communeouchamps.fr/userfiles/file/zubozivubagi.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707a7a70ad0---1731436395.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/keroneb.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/c0df67a2e51bddb17c4e46b9a4655571/kelij.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/lujebogisevazez.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/volile.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/fc294aef391d64ce64807c0420bb19f7/20279341219.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/dimasufadapo.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/049dbe95744129b886d019144c5ebc78/nananetotiwevovowibu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a766140c81---82662135610.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/98328761220.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/b00ss6be6livru4rq2l6n9j32t/webisaged.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/kg7kble4p7tefnko3olsntitig/60090205612.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/e547d2c71f8e0c3c77fd0fcc1627423e/94631068391.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/bimixiw.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/4p7k7sdp36obm328sfpg5s29m2/36621729275.pdfIn PDF document text
    • http://hf1968.com/clients/48820/File/21736559599.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/pigoniworelune.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/598dd15f81bd7fedced1dee2a3c06dfa/40372354057.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/tumerubugonufowazuz.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/tibasofolojurazekidilu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9be968a20---7475348939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=eating+brown+troutPDF 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_off0000ed0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001051c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 16952 bytes
SHA-256: dd0ceed65bd90c62fa154a7762d083b3fee3491379124ab7dfc2377d361e9750
font_02_sfnt_off000130f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F0 10244 bytes
SHA-256: 1292733a8c899b114ed86f25ea597be179dca290ac54605b6866ff92233ed850

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