Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e15cc0c0da11a3…

MALICIOUS

PDF

88.6 KB Created: 2021-08-20 14:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: de72d4a5ba657cd24cb7996b4fa40b04 SHA-1: dc79e7866878c01207f88c3b99c8de422aa16b0a SHA-256: 14e15cc0c0da11a335a65a75cc1a89ebaad6769b89a2fb8251dfa1b6d3987afc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of external URI heuristics and the nature of the URLs indicate the document's primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://infrive.ru/uplcv?utm_term=ap+human+geography+migration+crossword+puzzle+answers PDF link annotation
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/63f38ff6077b256c18a6d6e01e9ec725/38391995221.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/07/14/file/gazitaxamemaz.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/20347581970.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/siwolibirubabedubuzuk.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/58778972546.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a287ca73d6---puduzuretuzotivirijus.pdfIn PDF document text
    • https://hse.tw/upload/file/fejevizumalegekog.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160780ccc74a4d---5546430195.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085748c3b8a6---matunokowobifaf.pdfIn PDF document text
    • http://gabortech.com/admin/file/zebezopiravofosagubewus.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080363602b10---juwoviwufimikadiken.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/86c02256cb9846704a750d2257db9820/bididudisemaxegu.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/32cbc78721e3658ad5568438f1a16e1e/mevedetiwov.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e37754fbed---20006877045.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/13636709601.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/84436131911.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/861093334.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/bmb7ak2utvp0ubpv76770b75a1/77312471378.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/gibawudusuvesu.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aec66f0dbe0---bamatotedubewoju.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/92560513014.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082c3bc0134a---46231495158.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_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA7 11304 bytes
SHA-256: f957dca0683994ed953782aeb355b440aeaa4be0c9ed9f83c099f7902eb16d8a
font_02_sfnt_off000128f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F1 16744 bytes
SHA-256: e34c597db9fb23cfe1602bb64bbb7669fe53d2488376c1becbb4b7d9cdff29ed

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