Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe44cc5ef49c96b…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 23:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8b4d156ec95cbfff6a18a30701c17133 SHA-1: 27a7c14e7cede3692471ccf708b39a89beb99058 SHA-256: 5fe44cc5ef49c96b4ebad68b4dd8a6dff08071b334ee9f5999e1a5d89b8419d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to other PDF files hosted on various domains, some of which appear to be compromised CMS upload directories. The presence of these links suggests an attempt to redirect users to potentially malicious content, such as phishing pages or malware downloads, aligning with the characteristics of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://desiaussies.com/ckeditor/uploads/files/34658646817.pdf In PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/xezap.pdfIn PDF document text
    • http://missinternationalbeauty.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/zupikikosadefalikamomoti.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/3919220295.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/85780598941.pdfIn PDF document text
    • http://24cvety.ru/upload/files/56399808928.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/57857486215.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885ef90f16b---dibese.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/8e28o8oqp0b8pf1lhjkflnqtba/gimas.pdfIn PDF document text
    • http://proxima-design.cz/files/file/91929332670.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/f2115719fa0aa50683d26a1a675f0b79/33239038014.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/c109a21e7840850a0dabd7437e6f0a92/fodoliz.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/0fa72ba528490a10b3e8baceee0abcd3/27446682568.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/24788315020.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/wunosutib.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/3c5c2566c6aaab10cfe15c8a27bddcb9/24669796267.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/77311019442.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/59016390135.pdfIn PDF document text
    • https://defaico.com/d/files/5524397422.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608742471f16a---35428586251.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/81651369416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=derechos+fundamentales+de+la+persona+humana+en+el+peru+pdfPDF 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_off0000c88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88D 10896 bytes
SHA-256: 83171e2d7e4b88416b8b7d0651624f599a4edced7789e7f87a93a6f95c54e9b4
font_01_sfnt_off0000e194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE194 18412 bytes
SHA-256: 8df5264e7ac84b6c153aaa1caeb2323d655e5ded6bbadf3162424449ac04a5c1
font_02_sfnt_off00011056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11056 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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