Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b088ec997913be…

MALICIOUS

PDF

75.7 KB Created: 2021-09-20 17:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fcce89cb71f71c385e215d6915eb4bc7 SHA-1: 8811ccf3b71b52670fdb6a8c9e3c3b5ef52624a7 SHA-256: c2b088ec997913be699f0354c72b0bb9a93adc18abbb2ce324bdbfe7ce745ec7
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution lure. The presence of multiple PDF links within the document further supports the attack pattern of directing users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/megelirumujew.pdf In PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/66032315992.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/36340248748.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/vabenitudizotajerijofameg.pdfIn PDF document text
    • http://mobilenmr.com/files/files/wapigibelez.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/milivodovowizepadipiv.pdfIn PDF document text
    • https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/podip.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/gexulusagafixekinutavur.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16145e4f38e892---wogudoradawijigusaw.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/butaforotidivofabi.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/89225566070.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/23857870775.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/dilobelafemaza.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/48380141412.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d7600e448---35988051781.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///butimu.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/4gnuf4p30ep3h9fnmeaciqo6ej/lifasisakexefixedavosige.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/80914722259.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/21928600682.pdfIn PDF document text
    • http://robedecreateur.com/img/files/3660533772.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/81796634174.pdfIn PDF document text
    • https://cooperspick.com/files/fowowodafo.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/nakivupom.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/wuboz.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e899d7529---60552702938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=cheetah+keyboard+2019+apk+downloadPDF 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_off0000c2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD3 16948 bytes
SHA-256: 00547c3b27cddabc9a4723c05f05bf3b42e37c66fd047648a92be76ad623de47
font_02_sfnt_off000106ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CA 11152 bytes
SHA-256: 01ab1cd999c6c0bc20e2abcf1942beb2136fcc5acf3901fc9389d087b58ad7e1

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