Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee07f1c00dfb149…

MALICIOUS

PDF

86.4 KB Created: 2021-09-18 09:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b141760b8c05d6cf8fefc51239132320 SHA-1: e21092a3db55f3ffa8ea18a7e296434794d63611 SHA-256: eee07f1c00dfb149b19ce9744eea379ff4f39d0553c96ab26d2bc53615b904a0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm designed to redirect users. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://irlanc.ru/uplcv?utm_term=futurama+full+episodes+free PDF link annotation
    • http://ever0036.com/assets/uploads/ckedit/files/20210912230525.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/97496377238.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/xuvidekuwoboz.pdfIn PDF document text
    • https://gornjastubica.hr/files/10559726359.pdfIn PDF document text
    • https://digireg.it/upload/ridakeveju.pdfIn PDF document text
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/37582533125.pdfIn PDF document text
    • http://zamgph.com/uploads/file/132323162945.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/godirepokezarupelamowe.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/70858241609.pdfIn PDF document text
    • http://turinimoti.com/assets/userfiles/file/5970598890.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/vefefenuxalo.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/99066989204.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/daponazisonujorevila.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/vivujapovufuxisakagojav.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/18535065540.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/71865704684.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/wakujaripokimo.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd6bb05af4---sodewamubulejitepitabeviv.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/levopojarolobasebopotupoj.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109041207269187.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/27025393461.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/48719886220.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/91235510012.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_off0000edc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC1 17792 bytes
SHA-256: 3b8180968b31b5505989b7af48a50a1b4d22345d2e9f6ea4c2d12870558c5d85
font_01_sfnt_off00011be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133FC 10632 bytes
SHA-256: 4c7875024c8e2219dd04de53ea8ad8997b937013731ad5ee88abf6a092fb9795

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