Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e9bdb25ce55c75…

MALICIOUS

PDF

85.3 KB Created: 2021-09-18 17:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e80edf007b75965cd450abe31a5b7a1 SHA-1: 51644c6ede2b42d8704c206e85aba55833061202 SHA-256: 66e9bdb25ce55c753413b25b1b0fe4289750f6271ab84f488d5dc2ae08f9161c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded JavaScript points to an attempt to exploit vulnerabilities or execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://inwebjor.ru/uplcv?utm_term=ap+music+theory+book+pdf PDF link annotation
    • http://parateam.cz/file/nonopimojotozeteb.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/100b6fdc4307fe879468e33b2c8c53f4/60038849387.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/xogegu.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/12097637398.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/87234732740.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/vajamigejaxiwejamivideko.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/77165578698.pdfIn PDF document text
    • http://azizolace.cz/images/file/gesurugewimis.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f94f56b55e---6486117091.pdfIn PDF document text
    • http://cecev.com/stockages/files/potuxeda.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/13787262706.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/fodolazate.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/bugomidorex.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/48780917610.pdfIn PDF document text
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/61135120453.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/guwatuvipudemewunowitoge.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/60373248695.pdfIn PDF document text
    • https://sinarwaja.com/account/files/77926372503.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/dekabov.pdfIn PDF document text
    • http://yjccnc.com/upload/files/gikexinobedowawalalexevo.pdfIn PDF document text
    • http://asqcert.net/files/files/56777017725.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/gokiwimunixes.pdfIn PDF document text
    • https://mediacentre.aerlingus.com/js/ckfinder/userfiles/files/64985616726.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_off0000e68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68C 11000 bytes
SHA-256: 94410bc0328b824eac166f9105507c9b4d42228387670ee4adbcbff2d7afa72b
font_01_sfnt_off0000fff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF4 18364 bytes
SHA-256: f4c5c97ac463a54f08dfcda67aedbdae931bd1197f8cdf78a3937ca5ad9b0195
font_02_sfnt_off00012f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.