Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7eda9a282fa46ee…

MALICIOUS

PDF

68.4 KB Created: 2021-09-27 12:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1f7ea9e092563f63a2ae3002b817311c SHA-1: c2cddd1744b1a7af6fdf5a1e03c3147617979c48 SHA-256: e7eda9a282fa46eeaab64b6e33fbcd9a437988c4303e2773a6504b738d6e7088
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users. While no scripts were explicitly extracted, the ML classifier and ClamAV detection indicate a high likelihood of malicious content, likely involving phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://laborke.ru/uplcv?utm_term=mrs+dalloway+full+text+pdf PDF link annotation
    • http://studiotecnicomartani.eu/userfiles/files/norasadekojuvodujotezemas.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/giputonoxemegevomane.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/buzunumonuxoririzizubalu.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/52287012499.pdfIn PDF document text
    • https://foodthings.us/userfiles/file/lutuzalatan.pdfIn PDF document text
    • https://epm.jot-solutions.com/files/fowokizoronekag.pdfIn PDF document text
    • https://resicolor.com/upload/files/99372158079.pdfIn PDF document text
    • http://ekorepetycje.eu/Upload/file/vetifurewulevegefor.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/31765424814.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/dafiparefawuwi.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/dizojeserepobesolexa.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/popozijijirimarinibakutip.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/rakamorutolemepawataku.pdfIn PDF document text
    • http://olympusflights.com/files/files/36139465455.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/damaladulal.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614caa8a42eda---reniwav.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/bawudijuzux.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/64502079808.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/rokuwakunuzoginevor.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/torere.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/23822446488.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/81208344049.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_off0000aef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF2 10688 bytes
SHA-256: 39d56d48cbe6f391e9e42929068ce16020b012e62e4c11ef75b9a9a9cdd7d432
font_01_sfnt_off0000c7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dfd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 14380 bytes
SHA-256: 953fe5bd474467f55b2ab7b7a60c8f66930a5a4793092959630653554f03c687

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