Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ac343267b63c56…

MALICIOUS

PDF

84.2 KB Created: 2021-09-19 06:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0c21fbc07c0acdbabdb758584c6418ae SHA-1: dccfc86a80f3cfae81de70c8e9087cdfb8cc4fbd SHA-256: 96ac343267b63c5659164f1cdd4259246818b1947a228bc3fb4bfbf2afc6a639
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to potentially compromised websites, including those using CMS upload storage, suggesting a link farm designed to redirect users. The PDF's structure and the presence of external URIs strongly suggest it's used as a lure to deliver a secondary payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=dream+player+apk PDF link annotation
    • http://ardennes.proximeo.com/ckfinder/userfiles/files/21695588812.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/bigadopaxudujep.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0b03cac8b5063e9790aec37cb29dd813/25916975081.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/161467ed9c8be3---vipaxizimosutowofe.pdfIn PDF document text
    • http://seasonmediagroup.com/pic/file/xugatoxopozegejidukuxi.pdfIn PDF document text
    • https://togeltop.net/contents/files/89781829842.pdfIn PDF document text
    • http://changjiujz.com/uploads/files/202109130405169016.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/fojurabopojadamakumadi.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/tilulatimibas.pdfIn PDF document text
    • https://gulamanis.com/contents/files/94230616686.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/ganoja.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/fekaw.pdfIn PDF document text
    • https://nieruchomosciprzetargi.pl/files/file/veniwefarafofudoveluder.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a02daad227---mavupuxipefetafuwaniraje.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210912_110837.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/8158811364.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/moziju.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/gojedavugijakebebanoxu.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/fekolo.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/lovinaxeni.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/pexorinunukidevukawotuval.pdfIn PDF document text
    • http://iltorg.ru/upload/file/xelasubinukagajuti.pdfIn PDF document text
    • http://damvua.com/damvua/public/images/files/gemowomobo.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/74855449740.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a75388d6be---kolulajadawamesaxotomag.pdfIn PDF document text
    • http://355353.ru/userfiles/file/wimabezepavazu.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_off0000e45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45E 10036 bytes
SHA-256: aa0797f1b7ef108c6000a119f029242d94ed9a0456b4349fd352ab4b031febe4
font_01_sfnt_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C1 18600 bytes
SHA-256: 4f8cf05499a1405034d4e8931bf10d82f07436d54ca6048b6ebc7408ba920084

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