Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea216cf67bdef36…

MALICIOUS

PDF

70.1 KB Created: 2021-09-09 21:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0f4f42991c7119baa3a0bd32deaf9ce4 SHA-1: 0b9b8fa9f48c6c0c1fba38e09016212335b916a4 SHA-256: 2ea216cf67bdef36115f453310a3b1264362d11a0454243d2431b0b76abbebc8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The PDF also exhibits characteristics of a link farm, with numerous external URIs pointing to various domains, suggesting an attempt to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://citytrafik.nu/images/file/temalozipatodije.pdf In PDF document text
    • http://www.ekoforte.com/upload/file/razexexivupoxipagoni.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/tegexajawoxoxolulifozifo.pdfIn PDF document text
    • http://punaide.com/userfiles/files/14332520674.pdfIn PDF document text
    • http://barefoot.pl/userfiles/file/91790422021.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/kokavemajetofisepa.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/zudanij.pdfIn PDF document text
    • http://myesen.life/userfiles/file/45277161603.pdfIn PDF document text
    • http://ageofwonders.buka.ru/sadm_files/vupafagutumudaka.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/fexipokozopofig.pdfIn PDF document text
    • http://fourfoods.com/images/files/venexopiv.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/15791626403.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/29978701701.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/gatimilapafokiri.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/73599239114.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/45958118926.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/sasitoxunalanuwof.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/31851362290.pdfIn PDF document text
    • https://izometal.net/mm/file/7919627574.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/zekagogigiponidodijelog.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/liwobivasozega.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/xerafedukafamebaf.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/netixo.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16130920c02a25---37491065273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=vanguard+space+marines+codex+pdfPDF 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_off0000b36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7C 14956 bytes
SHA-256: 9dd94edbcc6b9e052fc85086a6c80c4fd8eb75ff78936ba9e07aacde9515ce2d
font_02_sfnt_off0000f153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF153 10992 bytes
SHA-256: 511ea5b89689496eaeb97cce9a8c20c4ffa8d0a9ce23711f7083710acdbe2450

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