Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2e9a7c273515d8…

MALICIOUS

PDF

85.2 KB Created: 2021-07-05 07:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7dc7f6f639b8770347fc5e3669a2e0fa SHA-1: 234b36265344f1a32b50f250fed8ff0ff3b123d1 SHA-256: ed2e9a7c273515d830a73f48c28ed367b4f4ea572df0dc870d3f878c586b1095
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. While no scripts were directly extracted, the structure and URL patterns are indicative of a phishing or malware distribution campaign.

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 http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbc0b819f3---xezarimatilugilitidad.pdf In PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/ae29adbe48a2d0a98af8aced592177e4/76301150646.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/zuximapikatomujenunig.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/fiverenazemubiwaz.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b86fcde4e---visoli.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/o129qcst2l0fl4oh4onvp1ea8n/19575250663.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/9254c19c36543c8654954af6714b17d4/jepowovavufurokusutezufob.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/wafazinogemiwiwoxelikom.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/pe95a412f1pi5erjuclab3ukt5/dasejazapog.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607577ab6611f---25066318213.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/55604276895.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/gopipesamajizesexi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f358975eab---nejufilakadakesixaro.pdfIn PDF document text
    • https://btegypt.com/file/gabese.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070175b90308---soretuben.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/50296320332.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c44bf3c157a---ferowenapoxufopuwapuxu.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de94e1cb29---69938535262.pdfIn PDF document text
    • https://easybuildapp.com/files/uploaded/files/82208301687.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/96baf635acd330837405ee7f36ca35df/rovujo.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/323d4aa92c53b578979d1fd3de1aa240/zoterimorixafateresa.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/68794364241.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e51f0d2ff---39130182362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=pros+and+cons+of+zoos+debatePDF 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_off0000ea68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 10532 bytes
SHA-256: 8a32ca64f52a3785010460a58348688117703eb06c04bae28bc78860720e04d8
font_01_sfnt_off000102a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB8 17136 bytes
SHA-256: 817d917730dc9009e07a89756ac01619280273c7b70b2435249de9543301a747

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