Malicious PDF — malware analysis report

Static analysis result for SHA-256 07eb43f6139d17e2…

MALICIOUS

PDF

77.0 KB Created: 2021-09-21 03:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 835180359b25a5f522fd0c92098efa81 SHA-1: d12becc1939b3a023b44f9f52393ddc732e8ff44 SHA-256: 07eb43f6139d17e290399d0a7263f831911551443f2c54cd2fe611cdebc8fa9c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://kup-vino.cz/web/ckfinder/userfiles/files/31039457162.pdf In PDF document text
    • https://searchlink.org/userfiles/file/89940322009.pdfIn PDF document text
    • http://apartamentykunickiego.pl/architekci/public/upload/ckfinder/userfiles/files/24348007855.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/43440025656.pdfIn PDF document text
    • http://erimti.com/userfiles/file/1239013929.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/14298561720.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/lakixovegitubutuzuf.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/16305979291.pdfIn PDF document text
    • https://bolahijau.com/contents/files/peziwedezuvux.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/tapurafogiwodiriwota.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/zawebewubigupem.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9a91eb368---temazavojutazifikigive.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/86706664049.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/juwebivumezago.pdfIn PDF document text
    • http://sentralperdana.com/file/fitomepalapi.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/towogamitoro.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/paguriveko.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/kanofofogilafoposopizu.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/luliromatugulo.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/30260618340.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/vitefozivopizogedoxewal.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/31462181566.pdfIn PDF document text
    • http://uniontsg96.ru/admin/ckfinder/userfiles/files/waxedazasubigexurotijek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=instagram+auto+liker+without+login+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_off0000c8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E5 10888 bytes
SHA-256: 658ee212794160a7032784ad3bc62928816f7bbd8e12c5daea5654c5b842adc0
font_01_sfnt_off0000e1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F5 17092 bytes
SHA-256: 0c0c9b9a36c0b4c846b838c304ea0243bc243b741ef062edf41c562eca3bba2c
font_02_sfnt_off00010e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1