Malicious PDF — malware analysis report

Static analysis result for SHA-256 549b298c25c347d6…

MALICIOUS

PDF

71.1 KB Created: 2021-09-30 12:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 033434c744076433597c8ceb3429f65a SHA-1: 5e05a5a5a98bfedcd1081dda94e8e9fc0a934a7e SHA-256: 549b298c25c347d6c85927221ca54da168714bc0b8d172d76f54246c5f5f5e0d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and form a link farm, a common tactic for phishing or redirecting users to malicious sites. The presence of these links suggests an attempt to trick users into visiting potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://youandisagenix.com/ckfinder/userfiles/files/pavetedemavegisoxixini.pdf In PDF document text
    • http://hdg-gmuend.de/userfiles/files/72010800670.pdfIn PDF document text
    • http://master-br.ru/img/file/xevisepel.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/sogojakisiminaxofotudisa.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/27361133759.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/28304094938.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c13fad6f6---tujibazoledu.pdfIn PDF document text
    • http://pk.mo/userfiles/file/60317023210.pdfIn PDF document text
    • https://akconta.com/uploads/files/12886941587.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/rutukarijinawoberoviko.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/pejivemorarutaji.pdfIn PDF document text
    • https://gulamanis.com/contents/files/38475051402.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/kukiwepokude.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1614966cec14ce---sulotipopujimimo.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/64097671850.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/41525763779.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/vetawogabofazova.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/neruxeferas.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/95915050154.pdfIn PDF document text
    • https://anfauglir.com/images/file/21026637666.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/7623944685.pdfIn PDF document text
    • http://contelex.it/userfiles/files/jaworezo.pdfIn PDF document text
    • http://chugguwang.com/files/fckeditor/file/dirusuvopatulima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=java+pdf+libraryPDF link annotation
    • https://easyown.ddproperty.com/datas/files/36787804200.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_off0000b4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCD 10180 bytes
SHA-256: 1477d5facf9d3b79d69d1a6691705150a2e49659d5a12e427538ff0320a07011
font_02_sfnt_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 17276 bytes
SHA-256: 92e14e140b7ed75a14be4ba9d341b97317379b317f7a0280837a504a3e73daaa

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