Malicious PDF — malware analysis report

Static analysis result for SHA-256 edeab0e7c7c3d9c1…

MALICIOUS

PDF

84.5 KB Created: 2021-08-16 07:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 990afcc6309629f61743ae915aee88c2 SHA-1: 3db8d161c9f4bfc7215b255299e74b073bf5271f SHA-256: edeab0e7c7c3d9c1c5c611498c63dd62ddb1808fc15a31e093d8825d632bbebb
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 high likelihood of malicious intent. The heuristics indicate it functions as a link farm, pointing to multiple compromised WordPress upload directories and disposable hosting sites, likely to distribute further malicious content or phish users. The embedded URLs suggest an attempt to redirect users to these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c54c9a116---55771633685.pdf In PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ecd27c637---13366160342.pdfIn PDF document text
    • https://noddy.nu/images/file/xalupo.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/manupovivone.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/32283853640.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wuwimijibakusujever.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/0anfedp37q0qfjarrk0iog6125/pekamefijuwugipiraxaka.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e659061b985---12504574182.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900cddefb0b---nifunibimupesibeveza.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/e28l21d8q4ssdftnbcjj0rpal2/41794601312.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/kofuzivekebobutixodevam.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/59694120117.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6e97444c4---91393817483.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/ridemaxa.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/4f9de5b0f8c2cf6ed3dc973a42007ff2/mejurubuvufogavakizopel.pdfIn PDF document text
    • http://yuhongzg.com/d/files/25894373315.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/9628124036.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608599842abe6---97248727830.pdfIn PDF document text
    • http://coopmong.com/ckupload/files/rusup.pdfIn PDF document text
    • http://lottfamilyreunion.com/clients/878857/File/fidalozoxuvinemobamota.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/a78c36812f07bc987b794150919aaa43/19435117615.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b3c2d74d8---43161185168.pdfIn PDF document text
    • http://ruihuitax.com/files/file/mimodoretuxezomoxifufom.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/fea0dff66f1c67e4444b192a8a7cf991/pureviborabamimifuzejataf.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/79935750420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=guide+des+bonnes+pratiques+de+fabrication+cosm%C3%A3%C2%A9tiquestPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47a81352e3---busumirudopiragax.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_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 11736 bytes
SHA-256: f7a1efd68ee48856a49ffd7fb260d76950e9a449efd0e871b782b8dc5bc5f1a9
font_01_sfnt_off0000ff06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11718 17024 bytes
SHA-256: 892eacf1ba415ed63fba58dd360133ba07fe9d3daf3d1accfa4e8092ed099343