Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3088ef44d18385…

MALICIOUS

PDF

69.4 KB Created: 2021-10-01 00:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: e728e60d5eb4703bdc7257e57432d012 SHA-1: 5a2b20e072f8946d9cd96579187c6cf6d71f1941 SHA-256: 9f3088ef44d1838551c53fe7487c862cb39cc729fec200653ee0b3eb1e2e3280
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • 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=android+anyview+cast PDF link annotation
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a59e9ba45---51232987285.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/lerabefifulaz.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/72252406976.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/vulizukufusixenokadugima.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/sijinig.pdfIn PDF document text
    • http://arsvet.ru/img/upload/lividawapoxegadatotebabiv.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/sojixupadumogonezu.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/49774479374.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202109091841267973.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/pigoruxut.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/50109834321.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/97168392500.pdfIn PDF document text
    • https://thehouseproduction.net/file/32357305039.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/64147036564.pdfIn PDF document text
    • http://sportservistocik.cz/UserFiles/File/gilujizasitajunom.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/69964346668.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/66980922009.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/nominazasulolusemo.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/61756800819.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/e1835919a3f4f3eb484031d4c8dd8309/rifilifikelulefodaka.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/308852ef31a43a8f0e8866d4f3fb1ee2/3068785517.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/ruxedunuzedemu.pdfIn PDF document text
    • https://aecvfcom.nrgence.com/upload/userfiles/files/91190299403.pdfIn PDF document text
    • http://hueide.com/upload/files/63148622372.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_off0000b020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB020 10564 bytes
SHA-256: 76346bcf4765cdaef5145b5444a54b9665ae6667012375220f61aa2793e5c3a7
font_01_sfnt_off0000c86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86F 15672 bytes
SHA-256: bf794e801fea08c1780285cbaf699afe7463b5ce1f603d4154ddbf5953fcb663
font_02_sfnt_off0000f06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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