Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1c08bd2654cab6…

MALICIOUS

PDF

75.8 KB Created: 2021-09-15 20:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dbfffb510f63823549bf67981cf3003c SHA-1: c3d8885cb7fc89f2b0fa17ad308ae8b4933ea739 SHA-256: ec1c08bd2654cab6cc9e897f5d3533e48d35841fcc18b61ce129816daec67ac7
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 domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this purpose. While no scripts were explicitly extracted, the nature of PDF exploits often involves JavaScript for malicious redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://files.ibiza-ferien.de/file/82365238187.pdf In PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/8014993361.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/pobotifurajerokebuku.pdfIn PDF document text
    • http://furniture83.com/upload/files/tivej.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/28015292834.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/3977026679.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe6d5d1ef5---82205138762.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/lobef.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210909165549052.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/xupuduto.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/8d0e4a7784c97c7915dc271a0f798a5c.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/zodawijazawilo.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210912174503.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/96056972023.pdfIn PDF document text
    • http://malifer.hu/upload/file/57088371444.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/konujumuvewog.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331b6be549b---58691415906.pdfIn PDF document text
    • http://cecev.com/stockages/files/36155899088.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/56582167390.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/65670374315.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109100733171182.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/jigijemijosutarikub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=dulla+vaily+full+moviePDF 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_off0000c721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC721 10184 bytes
SHA-256: 3aa09c46df4254ec5a3085ac8f799d824ec7fa31a65ffb3e25b9435a0162762a
font_01_sfnt_off0000ddf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF609 17056 bytes
SHA-256: c5cd06e15630de4ec8bb1ae8ebf119e1099e10592bec9dd52601541b11ef9b2c

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