Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4d49ddfaaff86f…

MALICIOUS

PDF

71.8 KB Created: 2021-09-19 07:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cc4be4b4bd77f69d63f0088068d46ae4 SHA-1: b1cd8631944bca52d8c687d2996998160751c80e SHA-256: 0d4d49ddfaaff86f504891fe198d065741cfbaa4e09c0fe99d37afa2f0c50558
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many pointing to disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crewmak.ru/uplcv?utm_term=warship+fleet+command+ww2+mod+apk PDF link annotation
    • https://harkakotony.hu/UserFiles/file/33952235818.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/majerotubazidu.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/3e832400c0abd79c9e249e806dfc5fa3/najaruf.pdfIn PDF document text
    • http://chapelguild.com/images/usr/12861150433.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/67440046189.pdfPDF link annotation
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/58947339515.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/fokev.pdfIn PDF document text
    • http://xmzhj.com/UserFiles/file/fifoxezebuk.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/26912054804.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/godoxawozerubuzakokote.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/rovifopomek.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/revejidalazariwin.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/nipomibebokutir.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/tosan.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6113f0bc4---potinebubab.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/bikogesidefu.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/woxelekoxonisojenulebev.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/telonej.pdfIn PDF document text
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/purerububanududovomunugam.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/96097546872.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/ratewi.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_off0000b308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB308 11176 bytes
SHA-256: 360fc5fdc1687e9d5133758687bc0c7d409c9b72d704091ebd2f179ffdd96a41
font_01_sfnt_off0000cd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD11 17208 bytes
SHA-256: f29b1b5a5e9e5c9a44d9da1dd590166ddf68ee3c4474d79cbda529dbfd0c27dd
font_02_sfnt_off0000f9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1