Malicious PDF — malware analysis report

Static analysis result for SHA-256 96162853b6c312ec…

MALICIOUS

PDF

99.8 KB Created: 2021-07-05 03:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4c10db8e1562b728da3969e1e156f325 SHA-1: 4e0658a9b58939478edb2f83299784c41972f21a SHA-256: 96162853b6c312ec5d1bf3b24692734faac15f2b568947223d6897e4628785e7
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The file's structure as a link farm on disposable hosting further supports its use in a malicious scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://garglob.ru/uplcv?utm_term=electrical+measurement+and+instrumentation+pdf PDF link annotation
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/dbc25dd34886a7a16e8e9dd10ccbe8b2/36271661139.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/7168269122.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/sidemijufeviv.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/96408806377.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c0ced7923---jazutedeb.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/76758617780.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/784f8f4a9ba30a78eef685d56800a0de/zezetufe.pdfIn PDF document text
    • http://446888.top/userfiles/file/famunoga.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/14957657884.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fd962a635---mozokupomufev.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/betokuziline.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d22b356f77---wafimumul.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/pufevexupu.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/500d4946908df13b50e41287351a106d/miderokororoxomerizo.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/renijox.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/18fc8e642dfe8f36b070994bff09c41b/13880517765.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/80045979928.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fea5f24ae---meboviruk.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/6483698754.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/41eab3ijjh503u4tklhfk2jai2/nadugikudivipot.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/5ab1070867a1433ef1b6adccdae168ad/jejofadowufogakelovizol.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/tevezikebagigef.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c2665845e968e28257af2122ff958be7/xupikuwanisuxinelirara.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001064a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064A 16100 bytes
SHA-256: 505f1f16fb057e2a34e7666bb0a43a50f2e0b7bc0033e59b70183295ac12d2e9
font_01_sfnt_off00011b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001339d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339D 10864 bytes
SHA-256: 6d916ec8d019fd67d7ef9d4366ba8ab88620b5bd7d2ea57c30bb8aecd7be20d1
font_03_sfnt_off00014caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CAA 20276 bytes
SHA-256: 3ef9c626e796756898ec8e58d831d7fdfa3b9b5af5c956e654831f4fa583cfb5

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