Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78a62a73e53f8ed…

MALICIOUS

PDF

74.4 KB Created: 2021-09-21 04:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 511230896722b099d5f6575d748cae0b SHA-1: 2ce060e348585b0253b104cd51cb3acf60caf1c9 SHA-256: e78a62a73e53f8edf511e5fb1d469fa9de6eddce3dd95a04355fffa2c3fd38c0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and numerous links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://kompaspt1.com/contents/files/22574695362.pdf In PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135107780674---84259126518.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/wobapemuwoka.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/mizukipag.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/5498890960.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/71549530785.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/63883804958.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/lufewerosudufenamadufeb.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/fesakotol.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/redaxig.pdfIn PDF document text
    • https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/wezodatulugal.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613cae830c842---pudadowatise.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/77764730835.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/67155030606.pdfIn PDF document text
    • http://czminghe.com/upload/files/tulosavukuvotugekebifoji.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/nasapaxoni.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/kuxuwun.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/96130481508.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/zugatofaxe.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/mofodonibedavowakiduwus.pdfIn PDF document text
    • http://ifap.it/images/file/xesin.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/25754830059.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/43379419192.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/42781681615.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/45758701842.pdfIn PDF document text
    • http://sinocelltech.com/filespath/files/20210907035616.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/lixotupabumatuvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=helakuru+mod+apkPDF 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_off0000c2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A2 10272 bytes
SHA-256: e777a868680052499f7461b388156498c06a553352a6165e3a26c71b9be07548
font_01_sfnt_off0000d9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A5 16500 bytes
SHA-256: a3a5b6c552759510841614ee76f82a1fb548af3c65f225292049a9949024a28b
font_02_sfnt_off00010448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10448 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1