Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0ecd1babb34bf4…

MALICIOUS

PDF

71.5 KB Created: 2021-09-11 12:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0c5c0f08f3c3ff2b47d8b99ad1156bda SHA-1: 5e366e5c903732fbc723a65c9c756a76f1519bc2 SHA-256: bd0ecd1babb34bf44519d53ec17f3f0303d52d1b2ebbeaf6660cd819e30acb75
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript is likely responsible for executing exploits or redirecting the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://novinfasteners.com/userfiles/file/81615003795.pdf In PDF document text
    • http://vlajamo.cz/images/file/99855247785.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/20557078554.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/13712448774.pdfIn PDF document text
    • http://workontext.ru/media/file/xaladimanediv.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/fadidagojokeso.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/71972772220.pdfIn PDF document text
    • https://tmtteks.com/files/kodegubezofivadefe.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/3148293026.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132787ed071a---xedukemanaponaronevosak.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/rakofu.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/lixopuluzepemifiv.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/68177330982.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/88266654221.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/54001397208.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/dabukemilulebin.pdfIn PDF document text
    • http://eternaseguros.net/files/files/54444450971.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/rudamej.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e6a5063f64f38efbba4a2859aa3cf394/garizewo.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/64722136438.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/liluvosofase.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/nuxadusojimufatapinego.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/26629864770.pdfIn PDF document text
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/8460034162.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210906201208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=bloody+roar+apkPDF 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_off0000b7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C4 10048 bytes
SHA-256: e5b4355ac544d395bf8a0abb3af2fb888e3f88f46fbcc31fca4342d6c521e107
font_01_sfnt_off0000ce32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE32 16464 bytes
SHA-256: 363f39a35a8a2a9b15157dedc1605e7b598cb2890ca02e2087217c4bc708e702
font_02_sfnt_off0000f80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1