Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed127519419e0fbd…

MALICIOUS

PDF

74.7 KB Created: 2021-09-14 11:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a89baa494249fcba85b31daaac6fa977 SHA-1: 883e0264313e2e0abf780334b014f905a70dfbd8 SHA-256: ed127519419e0fbd5323aa90c0ebe9ac20c12b1619316bdd06cd036268fb5072
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://archism.ru/uplcv?utm_term=minecraft+pocket+edition+pe+apk PDF link annotation
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/1897729509.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/tijepifojisirekezowamadu.pdfIn PDF document text
    • http://underbutter.cz/download/foto/32523042371.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/19317508862.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/libadozisetavej.pdfIn PDF document text
    • http://clickvay.com/upload/files/nuvof.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/tevawajidepux.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/j7ht9bgeo914n0e70k4ai2s4ik/7654126567.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210905_FF13DF893D1BDCDC.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/73976832946.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/zenajobu.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/8708981942.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/3025478658.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/rebebagukegigipo.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/13568247004.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/92057179355.pdfIn PDF document text
    • http://stelmart.ru/userfiles/file/6367304870.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/xuluputarutawon.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/botijalawovuka.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/7p0ahfgjm9pq974gcormete3fl/zifubamivafe.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/medegolamoxagotimenedosek.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/86545568644.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_off0000bc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC06 18960 bytes
SHA-256: 358793f9e192674e4882ca4c14825677ad186be5211ba620957ed063649745b9
font_01_sfnt_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10570 10484 bytes
SHA-256: 0e2b394fb04d45d8579258ba3f92c3b92552294e01119fb32c6b94dba5b88e6d