Malicious PDF — malware analysis report

Static analysis result for SHA-256 9032a445fea65dfd…

MALICIOUS

PDF

88.6 KB Created: 2021-09-10 21:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5db86675901151b70547382ef3ad7000 SHA-1: f8aaec3d40d7f7ca054bf3503ae6d746b935d4e7 SHA-256: 9032a445fea65dfd82192d2eb21f07e401f5086717cac7fe2141c406986baf30
182 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and numerous external URIs, indicating it is designed to lure the user into downloading and executing a malicious payload. The presence of heuristics like 'SE_BROWSER_INSTALL_LURE' and 'SE_DOWNLOAD_BUTTON' strongly suggests a social engineering tactic to trick users into installing unwanted software or malware. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://krisoc.ru/uplcv?utm_term=screen+mirror+broken+phone PDF link annotation
    • http://abwrosedale.com/uploads/files/76335889231.pdfIn PDF document text
    • http://bookblog.kr/data/file/files/kafimagulipufiw.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/76678412340.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/buneduferenibaxezusagux.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/60898284442.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/boforesikevifit.pdfIn PDF document text
    • http://spbi.cz/res/file/newijofurirose.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/kurivotejemox.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/c3fceb268b4a0457dafa058491835a73/bevufifoxomalo.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/54621688037.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/23974047013.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/99104163096.pdfIn PDF document text
    • https://tivicom.vn/upload/files/60077228309.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/nerapewaf.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/17870123083.pdfIn PDF document text
    • http://mq-water.net/upload/79529563801.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/59673685636.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/bumekanazepavaz.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210905044612.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/kivuju.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a678330f96---99875112467.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/taxelefivada.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/jokidipaxerobaporoluxu.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/medowegukumebak.pdfIn PDF document text
    • http://travel-door.com/userfiles/file/vitedorinoxeverojapefejop.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_off0000f60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60D 18364 bytes
SHA-256: 546dcfbefdc5f20ac91d891beacd7e1bf68f0efdb8af474261e5d2432bb0d7c1
font_01_sfnt_off000125a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBD 10472 bytes
SHA-256: 4dbd38e2523a92ca653256de85cd06988f5e3ddb226498025ec1db926f3eac3f

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