Malicious PDF — malware analysis report

Static analysis result for SHA-256 61273b1b6595d439…

MALICIOUS

PDF

70.1 KB Created: 2021-09-26 15:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 427d07bdbb9edb55d06bf008202de90c SHA-1: 3adb180a4308a04ce464f9feb16e1cb5a06ec8e6 SHA-256: 61273b1b6595d439f6b53e87990a288c456786b56efc344907e99c19bac43dc9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://metallpress.info/files/36957001281.pdf In PDF document text
    • http://espicycooking.com/files/file///suruwivifipiz.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/pasesuzezowigimuxumax.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/97448029304.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/zagepatepepa.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/sezobadezunus.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/dunumivi.pdfIn PDF document text
    • http://biosystech.com/pdsFck/file/doxukarijusazebizafak.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/jeropakefuvo.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/vekowujuwil.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/wodupigajodofonoxutofi.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614acf30d1f94---34157028983.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/gilugekesosowifujas.pdfIn PDF document text
    • https://babamansurkurhuseyin.com/uni/yuklemeler/file/dewufivubiwiloderowamogog.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/32709513134.pdfIn PDF document text
    • http://ailizia.com/userfiles/72453833059.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/pajuxeluwomoxiloz.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/wisopagasapofaxexudawofop.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/davebuwawawakafirarizubej.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/makubidexoguvov.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/78415126764.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+52+lists+project+pdf+freePDF 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_off0000ad83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC59A 10800 bytes
SHA-256: 67b47624da167e5b0050ed2b9a6358dcd305053a6c7e967d463b702106c49913
font_02_sfnt_off0000dea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA7 17284 bytes
SHA-256: 87576a86040a01abf26a7a3255e5774ad8b492527d0287598e3b298b045bd9c8

Open this report in the interactive analyzer, or submit your own file for analysis.