Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7c714da6fbdc34…

MALICIOUS

PDF

82.0 KB Created: 2021-09-22 20:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 16d7beb292043d545101d32e7f19d837 SHA-1: b75dc3cf03cc40f5e109ed1c6d2f021ee009273a SHA-256: ce7c714da6fbdc34f48605d96bc7ccaedbb921164b463d4aacca6372658e6e17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an effort to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs strongly imply an attack pattern involving the distribution of further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://cructi.ru/uplcv?utm_term=download+no+more+mr+nice+guy+pdf PDF link annotation
    • http://ever0036.com/assets/uploads/ckedit/files/20210904070024.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/pesotig.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16141d2404d80b---renozewomedobi.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/6bpplckredssduc8k79dapjj1e/sadorafapazivonijoxuvuwug.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135c043a8c58---52356131075.pdfIn PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/38736975669.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/86003040190.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/58381754972.pdfIn PDF document text
    • https://www.geya99.com/ckfinder/userfiles/files/riwexesafo.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/3831642835.pdfIn PDF document text
    • https://esvigo.com/upload/files/bofutuwepegopole.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16143e9c1a7630---kodidoxejaredubivesubiz.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/72200395534.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/13942498245.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/63513900161.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/vudamimudizaboboregijiv.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/40719847077.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/xojufololupunekaju.pdfIn PDF document text
    • http://coachhouse.info/assets/file/62404730192.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/sozujusuf.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/ledogolikomuni.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/30908043160.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/bomepofoxapofivikitafon.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/fujufozirowimimajevetok.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/tupudoxegavinepisupolos.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b52be147dc---34408357872.pdfIn 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://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_off0000db83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB83 17720 bytes
SHA-256: ae37df8e5ac56521a10e2d5006cb15a0d536fcac65162b6c2056dc50c9d73b5e
font_01_sfnt_off000108ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AE 10996 bytes
SHA-256: ede29e78626bc728d380123837f8d058f664154044a515dea1fd3d134c186d2b
font_02_sfnt_off00012202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12202 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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