Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee800d84c342076…

MALICIOUS

PDF

84.9 KB Created: 2021-09-01 07:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3988c875f0e4bc87616701e79ec408dc SHA-1: 60d35ba250e6518685548972f8a323909c308a75 SHA-256: bee800d84c342076814e48050bbf45bd0d571b48921af8aa48a6280f7a0f298e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external URIs, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely attempting to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/5261585b09249f4d160f437613a42d55/79769213553.pdf In PDF document text
    • http://suliaok.com/v15/Upload/file/2021827213272916.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/57050768747.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5af89aea5a---jizomajovuxu.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/7519786537.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/29332235974.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/jozedoronuxowo.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/68531510462.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/zadaja.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/b691ad47b16d52ebf57c237d5075510c/10774222741.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/59483251536.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161047672b462f---wukuzorixoferoridaruboses.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/86813661516.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/4350659383.pdfIn PDF document text
    • https://gazelletr.com/userfiles/files/tojakiwesovojoreri.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/7ad9a9db62feb029b40aaeb5b16fe984/padikosokes.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/65c7ffee9167711f7b763a3f5ed41b21/29476201748.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/c1c5ab8fea97bbca2a21aec85f2e5ab4/manutifajegovotajitojor.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/bexezozisigu.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/006f51c063f4e3f12ee25d88c39b1daf/87374214684.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/8811096506.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a28860fcb---tekidisadasoja.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/bivexuvotomopono.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1433ec697---14599904037.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=sweet+life+of+an+american+teenager+castPDF 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_off0000e491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE491 10840 bytes
SHA-256: 1a2ef4431ba337b977c9bed89041f08511cbe958f4b47d2f2b35c75625f87837
font_01_sfnt_off0000fd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AF 18016 bytes
SHA-256: 2e97b3acfccb6db969251909fc02c35161802fa667f5224cccfb2820cd1bf6ee