Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebd06df3a7e195e…

MALICIOUS

PDF

120.9 KB Created: 2021-06-25 09:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: db2e04b326f457ae13b0fea263cfc15d SHA-1: 6910c86a783e13ec4c13a36b717a76ab2c6d63f7 SHA-256: 0ebd06df3a7e195e71fa78584849d7e1e0677caeadee651b6c803d3d13d6d534
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://oniceh.ru/uplcv?utm_term=how+to+install+mizuno%2527s+16+craft+cit PDF link annotation
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ce2e29eca---gasazobavebajo.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/49305884290.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/49119245856.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/97857147370ec45eb7aecce25e1bfe78/lomebexusitoniveju.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/b58c0bbb403b0fedc83dda9b6ca1ec30/68948671277.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c90d2777e91---1803330514.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/4ikv1egflmc3l7njasjihcbra2/94819725582.pdfIn PDF document text
    • https://jetaime-shop.com/files/96522174484.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/65441721733.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/sokinedurulera.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081429e6f215---88508766517.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609665ee150aa---duzuvuwawasajekufajufes.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/51237378953.pdfIn PDF document text
    • http://inse.us/uploads/images//files/29566632998.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce19e04fda---tesazof.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c5bcac2a513451c27d7a0ac3c8a32076/dabaxuribisurexigolu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fe2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2E 43172 bytes
SHA-256: 47cfda2bd260c5d88503072a0641c4f5a0116577a0cb48f87e3ba12b5aac3375
font_01_sfnt_off0001833e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1833E 5372 bytes
SHA-256: 6a4f93a6ad1cd21f965d3883438016e1c0e3fd08cf0f78841cbebde0ab51a3c8
font_02_sfnt_off00019594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19594 12072 bytes
SHA-256: c3feb04f482443de1da56a8358675b7100d4493065683afe36713081fab82f60
font_03_sfnt_off0001bf1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF1C 16192 bytes
SHA-256: e40acb388e5929862d68ad014e9788a4ebcc48eed690998ab48c0cb2c99c5f70

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