Malicious PDF — malware analysis report

Static analysis result for SHA-256 922d9feef2ec4240…

MALICIOUS

PDF

82.1 KB Created: 2021-09-12 03:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c6d2e20798aefc36d0a17cfc7a6eb5f2 SHA-1: dfeee58460909f7bbf73866fc30b2803e700e1d1 SHA-256: 922d9feef2ec4240afb45762a55d164cf0f5bef09f9a54a694824b1a454ed86d
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=badlapur+watch+online PDF link annotation
    • https://pristineleather.com/userfiles/file/zubasudapi.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/jopoj.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/kisuzefujo.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/42595424842.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/97193727710.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/20455119098.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/jaxox.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/46554289475.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/wavobubitevebojovili.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/fugidetesojezike.pdfIn PDF document text
    • http://dkind.net/userData/board/file/wafogenumukigujuxuz.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/gsn6it1sr872bl2e0ajdq1df16/kakigulezu.pdfIn PDF document text
    • http://www.nena-artspace.com/ckfinder/userfiles/files/pevelafiwojep.pdfIn PDF document text
    • http://gok-maciejowice.pl/js/ckfinder/userfiles/files/roguge.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/nirunawimi.pdfIn PDF document text
    • https://12shio1.com/contents/files/49283502498.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/dazixa.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210901232110.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336cbc248ad---lenepu.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/54043372501.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/suzofojexekasofolenoxe.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131774cce985---64179978397.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2d6038f9b---dafimokefigu.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161310001bbf43---19209086440.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_off0000dc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 17844 bytes
SHA-256: 9f154982f60bebf73cd8287575b55f4ee998ae1bb181ba60791d06316c15ff02
font_02_sfnt_off0001223c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223C 10680 bytes
SHA-256: 6bd3e350e837b28d39a5b4f239f511f35fc935965350edb1a1fa9f5fba3d51d5