Malicious PDF — malware analysis report

Static analysis result for SHA-256 1224f813958c0774…

MALICIOUS

PDF

80.1 KB Created: 2021-10-05 07:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d6c22d09f045b5c10f04696098d8b1e4 SHA-1: 5603d37e49fd690409dfb04de00d320abf7b35c4 SHA-256: 1224f813958c0774b263db88c85d35096442cd32aa58848aba4b11695bf20b67
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that exhibits characteristics of a phishing lure, as indicated by the 'SE_URGENCY_LURE' heuristic and the presence of numerous external links, many hosted on potentially disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://guineaservicesproviders.com/gsp/files/29768861636.pdf In PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/74334227413.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/86275322333.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/61877951625.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/xodogafo.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/pujerefukiwunigefikep.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/24562668381.pdfIn PDF document text
    • http://savemaxint.com/files/file/66457251102.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/5342954884.pdfIn PDF document text
    • https://piphoto.tw/uploads/files/202109252308145508.pdfIn PDF document text
    • http://rts-3.ru/upload/files/98705899463.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/geguraxavup.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/79253613138.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/38992245425.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109161019173905.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/titedotojunonuwa.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/jupabuxapel.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/54d914280e3edc7c0fdeca6e130bd836/dowati.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/kamewukakenevos.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/majojexezoje.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/44777832050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=live+net+tv+apps+download+for+androidPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/fumagodudesaluvemoxuk.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_off0000d61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61F 16856 bytes
SHA-256: 04bc0a1a4a327cb02a97237afd33f95a17095ec8e44843ce7ef7492a638a6bb6
font_01_sfnt_off00010205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10205 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1C 10600 bytes
SHA-256: 128f1d45eb61cc0c323849cd9e3d5d00ba5b06e7810e8495c629618313415e7e