Malicious PDF — malware analysis report

Static analysis result for SHA-256 7180be281ab5d2fb…

MALICIOUS

PDF

83.6 KB Created: 2021-06-15 10:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 202eb9847486f01aee75482014fde30b SHA-1: 80854ef2120f2bf5768759e528e597a5b6489b0e SHA-256: 7180be281ab5d2fb3248d10d716359bd601619190c3275be5ab2e7694f4dce0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised websites and potentially malicious download URLs. The embedded URLs and the nature of the heuristics suggest the document is designed to trick users into downloading malware or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://huntic.ru/uplcv?utm_term=turbo+dl+app PDF link annotation
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/5d98e7a678616aa12aa8597406636e26/33780509854.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26f388a402---66079610501.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7cd805cc9216db7180dc2339be5ffa86/bajepavunibob.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c2e7a3aa845f0e9aefc74c79d2d32982/59068733596.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b6e45ae8---kokelesa.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/88154411725.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/d76490be79b69c92772ac28b78e0ceca/rudutazafarufawojasapif.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/fa187faf7734f06620882172544d2575/lowufolilawudomobon.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/9e34381b1acdf3b666fc46c1912b3e8f/jejibo.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/vonexabudumexebitil.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/a2deat64qq65808n9utug094j0/90112288070.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/27483317447.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/f8sn5p4i9vnl0p4ao1io0q7sb1/tiwavidafemejawod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 4392 bytes
SHA-256: 5e211a93d8bbba8c518014488197483eedd38de120717097026bfa4b6e75f39d
font_01_sfnt_off0000f5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A8 13324 bytes
SHA-256: 8363d398396e5502f2f81d59c0af9902b4363a0a830dbd129a462276e067c68b
font_02_sfnt_off00011e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0D 16224 bytes
SHA-256: dfdf1310371f20a79bd5725b663a44d7876ccd2069675fb3f8bce87ad8508ca5
font_03_sfnt_off00013356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13356 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3