Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fac0e865dd9b8a…

MALICIOUS

PDF

71.5 KB Created: 2021-05-27 01:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 00a481989f5938281c4ca3330938044f SHA-1: 16147ace3b29122ab25b61b2d484e50f6a3db7b1 SHA-256: 04fac0e865dd9b8a8f2d290f60a0edf88438097c1a1fca34f14f1fc7269dc8fb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body's garbled content and the presence of multiple PDF link farm heuristics reinforce this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/v5pmpujh01b6ac5v7ubqivm9qt/32634333448.pdf In PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/1a94aff18526e633a5ff665c581d647b/45093175123.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/h6a7a4bu9ncd0h6ocolnf08s2r/fobagib.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/78381a78803890756c3b6fb40f460e59/litukinenijenabipitokeba.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/b9561e1ed5be08370137e6fd1712246e/jopalaguzejuzaxagufiwuj.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad93570819c---nigokurav.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/6r2d4tmmd6fj43ng51f98mfbd7/josibiki.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a986446ba8f---kasupuramizibib.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/7620211292.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/b4665ecd92540f1ab2b058ca4a1e0a79/59197717797.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/29011545046.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4c5e67358---94964164780.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16072b00d0be31---gapojitepevokobotaxan.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/64812028798.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/86dc74602d28efbc254dc6d5fb784635/tafituxas.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210520120441.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/kotimekipoxor.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/7757ce3f72a61ac6a19591781fa45f9b/zizerezazosir.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/c6b0361eb4bb0c81e3ef4f2f5e1a4495/4526943511.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160895b39b32d7---83279134030.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=soccer+star+2020+football+cards+mod+apk+dinheiro+infinitoPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CA 5976 bytes
SHA-256: 6615be6caf94616a82d75cea30e338008df62550b80fa6aa43da471275086e9e
font_01_sfnt_off0000eceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEB 10300 bytes
SHA-256: 445ca3e6c19c1f9dd666a57f74fa750799a6bd642b38ba8ccd76469c4b274252

Open this report in the interactive analyzer, or submit your own file for analysis.