Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e08a89ad0068712…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 09:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 64079ef4f2f79f142dd3a20a0ee4c5c1 SHA-1: 30dc07e6428a956c5c4d5eb4a1faedf75345abb3 SHA-256: 4e08a89ad0068712e6c8241b427c27467c175519b20617e27ba5cb4f6a7000e9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=ivideo+app+for+android PDF link annotation
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/ximaletapupasumofasej.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/47834712929.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/bowore.pdfIn PDF document text
    • https://dalba.net/other_files/File/74371043324.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/gevim.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/tesefenazuxuwa.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210902005911.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/56348240899.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/18216076263.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/8551205542.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/kagijunowuseruxetixasa.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/dosajaginafavirulazabaru.pdfIn PDF document text
    • https://viktorina.ledoritulys.lt/files/90388942676.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/46979489194.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/xetujiribatip.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/wizojomimuzatijapewab.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/rinolotidujid.pdfIn PDF document text
    • http://isvpro.com/custom/files/zajajajavixitaniraxun.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/javowukugasexenedewu.pdfIn PDF document text
    • https://mimpishio.com/contents/files/36219026102.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/perugu.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/zakovegufojiba.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/74527130879.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/jawavinopuba.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_off0000df88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79A 17536 bytes
SHA-256: f41a1ef2589e22b3c6800119bcfd95752cd5615ebd836fa991021200c34c19d1
font_02_sfnt_off00012541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12541 10196 bytes
SHA-256: d21c890c86f0ccc38ffa4b9c2f00b41b1d681f06f7acfcc879b9bf7ced884115

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