Malicious PDF — malware analysis report

Static analysis result for SHA-256 018a62ff629f35e1…

MALICIOUS

PDF

75.8 KB Created: 2021-10-04 04:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dd14168bd338b80a8bea8a519e1e2157 SHA-1: 36cc6a1e636158be03546a2ec4a17876e3572ded SHA-256: 018a62ff629f35e1ca7f6ac1e56edd950e04181d0eec1a69624400072344d0e0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious or unknown domains, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL distribution are consistent with a phishing lure designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fotocaroli.it/userfiles/files/dedubevepa.pdf In PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/sobabuxexeruzexoz.pdfIn PDF document text
    • http://bdn10.cz/files/file/lixeka.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/elnfgl2idtn9bb5l0lfegoq9l6/91936255702.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/91432364066.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/lipagoguramevesibilowuxuw.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/66055180457.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/13909005873.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/24726319516.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/72812745311.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/beedcd8d8e372b996d3ee0c4661d223c/28495109796.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/bipuripalebegozobadekop.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/30057068827.pdfIn PDF document text
    • http://taociren.com/upload/file/210912185258461002gmzagtga8agi.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/4600322646.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/femuzimegokonugu.pdfIn PDF document text
    • http://ck-buhgalter.ru/userfiles/file/88993669064.pdfIn PDF document text
    • http://holzbau-napetschnig.at/10152291436.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/30968783892.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/5955080511.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/tajujiroxajolojo.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/nutuguwidowazul.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/dokibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=jenkins+pipeline+unset+environment+variablePDF 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_off0000b9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D1 10804 bytes
SHA-256: 5609d5a3d25d0af8a117cc6b2892b013a57d6c80f7259ea26b23e64994cf3bd0
font_01_sfnt_off0000d28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 20116 bytes
SHA-256: e69c4265edd0977415ef6bbf1a76e46be843bc5b840b9754d09374a19dd0febb

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