Malicious PDF — malware analysis report

Static analysis result for SHA-256 93eda6a3ec4bfd37…

MALICIOUS

PDF

80.4 KB Created: 2021-10-17 11:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 63c3f618a3a43301a97db1af4fdb932d SHA-1: 8e6db416c91998e6dedb4c43e3598f0988827865 SHA-256: 93eda6a3ec4bfd379d2a7de9905efe41f21a2127c25e5ca630886c77f3fe3c63
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a raw IP address, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this, flagging the file as malicious. The presence of embedded URLs and the overall structure suggest this document is part of a phishing campaign or a distribution mechanism for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.prieteniitehnicii.ro/documente/file/85977887853.pdf In PDF document text
    • http://shinaval.ru/userfiles/file/21351391402.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161633fde640f6---widajaraxemaduwuvogusox.pdfPDF link annotation
    • http://xinxinhouseware.com/uploadfile/files/61733019243.pdfIn PDF document text
    • http://0228339500.kad.tw/kads/ckfinder/userfiles/files/patafipefiwitibubita.pdfIn PDF document text
    • http://thepartybooker.com/userfiles/file/7897948778.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/51809766247.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614d31ed53a35---sotelefobuwotutoxarufuba.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/kejotariba.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/zuluxese.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/5d4ded7d5b18e0e3421a1bc4d72b6594/wezipesusaduxo.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/fozagilu.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/fajuwafatovifazu.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/gizof.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/94884264840.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/ferupowinesarexesimuweta.pdfIn PDF document text
    • http://www.ntweac.edu.hk/admin/ckfinder/userfiles/files/55164157061.pdfIn PDF document text
    • http://topflexsports.com/uploads/50889187574.pdfIn PDF document text
    • http://irollee.com/userfiles/file/wejaro.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/3786858960.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/99936746618.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/zuvipowuj.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/RC0zOYPQW8A/uplcv?utm_term=what+is+a+substance+made+of+two+or+more+elementsPDF 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_off0000d7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B7 11060 bytes
SHA-256: 452a8b83c17a4e847bff60dad4bdf6f6f1bb960169ab2786890857b1d7909bb4
font_01_sfnt_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10964 16772 bytes
SHA-256: 6d3f3bcfee4a099a99a1c13cb488d98166b43fcf5886b2157b16ec470a89dade