Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00ae47b1dca4fa3…

MALICIOUS

PDF

78.7 KB Created: 2021-09-05 13:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b6dfef559de5cf7e14cd765ee2dead57 SHA-1: a93d522a04a3575e7cdea748a58ab9c916a18915 SHA-256: c00ae47b1dca4fa3c4655509d209ace1ebdf627c73023d64b10cdd14a7af896b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hargagila.com/uploads/image/files/20181633254.pdf In PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/tui2l5e4vjf8aajsq99ltldvle/7274810727.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/h1sce203capmo5a7g090dpl807/papidoxumegogoxed.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/gakinatefipowivuma.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/g10i23je4i47r4nm5dr2v0me30/jolifoxajegubivod.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/xigubowekasutupotazip.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/14572586959.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/b93730426776e3966dd8ad6edf091069/82906246366.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/44223342870.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd85f09028---xirugekoribujoduwud.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/bozifotodejikuto.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/34429491221.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/lijigasazupeziku.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/23148759242.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e05b2eee673---83691566626.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/77708450632.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/gevumedixexufemajuwa.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/73614252183.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/vafegeledozetanive.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/24436226468.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210624170411.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=convertir+un+archivo+de+pdf+a+word+en+linea+gratisPDF 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_off0000c96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96D 11180 bytes
SHA-256: cc1004eee88f733c50c408762223a302cfd06ff1398d394fa1afcc7c562e53b5
font_01_sfnt_off0000e36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36B 19608 bytes
SHA-256: 8184141b4fad38f641297ccc9f831e31e518c9a1fff906586289d091d82a1809
font_02_sfnt_off0001156c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1