Malicious PDF — malware analysis report

Static analysis result for SHA-256 9700ce5825343dc7…

MALICIOUS

PDF

109.2 KB Created: 2021-09-06 02:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 568c42ca34ace521d463cb46bc3eddd4 SHA-1: 7881b930573dac5d817d4bef34b3b7f44c45e0c9 SHA-256: 9700ce5825343dc75c3c480bd681f72d156e981b0272cbabcb1763818453e4ff
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, indicating an attempt to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of numerous links on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://business-baltic.com/myfiles/dok/34985517176.pdf In PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce0842be4---18095487489.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/161249ee8e27fb---lopexinakaval.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/33813378237.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/8599abf9b176ef9e8eb1457bd28750be/revabojotazuwelavatisix.pdfIn PDF document text
    • http://zlhk.ru/upload_picture/file/baruwafofalorobewa.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/febibisetokipikedagij.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/0789f4af8cfe54dfeb1d58f065124b6a/tavogomesubujoxawitok.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/muxaxelonajonofixatinoxi.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/34823048363.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/52535031135.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783f79d504b---vedeniguxoso.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2d8e27b6b270dddbaae2993ae024e615/42275477808.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/38231264406.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/42764405269.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/19832727968.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a4ee0b0d204bedc9026a61742094f891/13049016049.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/55626456763.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/zijigovinekajezulederiti.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/82444332250.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/10294271132.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/sinetizodof.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/72013282337.pdfIn PDF document text
    • http://hotstamping.pl/files/file/toxosagawe.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/fejowirukozotuvupowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=chemistry+class+12+notes+pdf+fbisePDF 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_off00014268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14268 19080 bytes
SHA-256: 5123abdb9ef1d5317417eb29c265bed7981980a426db1ffe30fc14968964e571
font_01_sfnt_off000174af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CC6 11344 bytes
SHA-256: 1a8a0a0a8f897cd15b474295e75c27ee4e95804891a2104cfaa0550e810b2eb7